agentic-net-examples / working-with-smtp-client

---
name: working-with-smtp-client
description: C# examples for working-with-smtp-client using Aspose.Email for .NET
language: csharp
framework: net8.0
parent: ../AGENTS.md
---

# AGENTS - working-with-smtp-client

## Persona
You are a C# developer working in the **working-with-smtp-client** category.
This folder contains standalone C# examples for this category.
See the root [AGENTS.md](../AGENTS.md) for repository-wide conventions.

## Scope
- Examples for **working-with-smtp-client**.
- Files are standalone `.cs` examples stored directly in this folder.

## Required Namespaces
- `using System;` (167 file(s))
- `using Aspose.Email;` (166 file(s))
- `using Aspose.Email.Clients.Smtp;` (136 file(s))
- `using Aspose.Email.Clients;` (84 file(s))
- `using System.IO;` (54 file(s))
- `using System.Collections.Generic;` (21 file(s))
- `using System.Net;` (19 file(s))
- `using Aspose.Email.Clients.Exchange.Dav;` (11 file(s))
- `using Aspose.Email.Mime;` (11 file(s))
- `using System.Threading;` (9 file(s))
- `using System.Text;` (8 file(s))
- `using Aspose.Email.Clients.Imap;` (5 file(s))
- `using Aspose.Email.Clients.Google;` (4 file(s))
- `using System.Net.Security;` (4 file(s))
- `using Aspose.Email.Mapi;` (4 file(s))
- `using System.Security.Cryptography.X509Certificates;` (3 file(s))
- `using System.Security.Cryptography;` (3 file(s))
- `using System.Threading.Tasks;` (3 file(s))
- `using Aspose.Email.Clients.Exchange.WebService;` (2 file(s))
- `using System.IO.Compression;` (2 file(s))
- `using System.Linq;` (2 file(s))
- `using System.Data;` (2 file(s))
- `using System.Diagnostics;` (2 file(s))
- `using System.Text.Json;` (2 file(s))
- `using Aspose.Email.Clients.DeliveryService.SendGrid;` (1 file(s))
- `using Aspose.Email.AntiSpam;` (1 file(s))
- `using System.Net.NetworkInformation;` (1 file(s))
- `using System.Net.Sockets;` (1 file(s))
- `using Aspose.Email.Clients.Base;` (1 file(s))
- `using Aspose.Email.Tools.Merging;` (1 file(s))
- `using Aspose.Email.Clients.Smtp.Models;` (1 file(s))
- `using System.Net.Http;` (1 file(s))
- `using Aspose.Email.Clients.Exchange;` (1 file(s))
- `using System.Xml.Linq;` (1 file(s))
- `using Aspose.Email.Calendar;` (1 file(s))
- `using var client = new SmtpClient(smtpHost, smtpPort, smtpUser, smtpPass);` (1 file(s))
- `using var payloadStream = new MemoryStream(payloadBytes);` (1 file(s))
- `using Aspose.Words;` (1 file(s))
- `using System.Net.Mime;` (1 file(s))
- `using System.Text.RegularExpressions;` (1 file(s))

## Files in this folder
| File | Description |
|------|-------------|
| [add-a-custom-reply-to-address-that-differs-from-the-from-address-for-handling-responses.cs](./add-a-custom-reply-to-address-that-differs-from-the-from-address-for-handling-responses.cs) | add a custom reply to address that differs from the from address for handling responses |
| [add-a-custom-x-audit-trail-header-containing-a-json-payload-with-operation-metadata.cs](./add-a-custom-x-audit-trail-header-containing-a-json-payload-with-operation-metadata.cs) | add a custom x audit trail header containing a json payload with operation metadata |
| [add-a-custom-x-campaign-id-header-to-tag-the-email-with-a-marketing-campaign-identifier.cs](./add-a-custom-x-campaign-id-header-to-tag-the-email-with-a-marketing-campaign-identifier.cs) | add a custom x campaign id header to tag the email with a marketing campaign identifier |
| [add-a-custom-x-compliance-tag-header-to-indicate-regulatory-compliance-category-for-the-email.cs](./add-a-custom-x-compliance-tag-header-to-indicate-regulatory-compliance-category-for-the-email.cs) | add a custom x compliance tag header to indicate regulatory compliance category for the email |
| [add-a-custom-x-correlation-id-header-to-correlate-the-email-with-related-system-events.cs](./add-a-custom-x-correlation-id-header-to-correlate-the-email-with-related-system-events.cs) | add a custom x correlation id header to correlate the email with related system events |
| [add-a-custom-x-delivery-token-header-containing-a-guid-to-uniquely-identify-each-send-attempt.cs](./add-a-custom-x-delivery-token-header-containing-a-guid-to-uniquely-identify-each-send-attempt.cs) | add a custom x delivery token header containing a guid to uniquely identify each send attempt |
| [add-a-custom-x-environment-header-to-indicate-whether-the-email-is-sent-from-development-staging-or-production.cs](./add-a-custom-x-environment-header-to-indicate-whether-the-email-is-sent-from-development-staging-or-production.cs) | add a custom x environment header to indicate whether the email is sent from development staging or production |
| [add-a-custom-x-feedback-id-header-to-capture-user-feedback-identifiers-for-later-analysis.cs](./add-a-custom-x-feedback-id-header-to-capture-user-feedback-identifiers-for-later-analysis.cs) | add a custom x feedback id header to capture user feedback identifiers for later analysis |
| [add-a-custom-x-mail-client-header-indicating-the-version-of-the-sending-application.cs](./add-a-custom-x-mail-client-header-indicating-the-version-of-the-sending-application.cs) | add a custom x mail client header indicating the version of the sending application |
| [add-a-custom-x-mailing-group-header-to-group-related-messages-for-downstream-processing-pipelines.cs](./add-a-custom-x-mailing-group-header-to-group-related-messages-for-downstream-processing-pipelines.cs) | add a custom x mailing group header to group related messages for downstream processing pipelines |
| [add-a-custom-x-message-source-header-indicating-the-originating-system-for-traceability-and-debugging.cs](./add-a-custom-x-message-source-header-indicating-the-originating-system-for-traceability-and-debugging.cs) | add a custom x message source header indicating the originating system for traceability and debugging |
| [add-a-custom-x-notification-type-header-to-differentiate-between-alert-and-informational-messages.cs](./add-a-custom-x-notification-type-header-to-differentiate-between-alert-and-informational-messages.cs) | add a custom x notification type header to differentiate between alert and informational messages |
| [add-a-custom-x-priority-header-with-value-1-to-mark-the-email-as-highest-importance.cs](./add-a-custom-x-priority-header-with-value-1-to-mark-the-email-as-highest-importance.cs) | add a custom x priority header with value 1 to mark the email as highest importance |
| [add-a-custom-x-spam-score-header-based-on-content-analysis-before-transmitting-the-email.cs](./add-a-custom-x-spam-score-header-based-on-content-analysis-before-transmitting-the-email.cs) | add a custom x spam score header based on content analysis before transmitting the email |
| [add-a-custom-x-support-ticket-header-linking-the-email-to-a-support-case-identifier.cs](./add-a-custom-x-support-ticket-header-linking-the-email-to-a-support-case-identifier.cs) | add a custom x support ticket header linking the email to a support case identifier |
| [add-a-custom-x-trace-id-header-generated-from-a-distributed-tracing-system-for-end-to-end-monitoring.cs](./add-a-custom-x-trace-id-header-generated-from-a-distributed-tracing-system-for-end-to-end-monitoring.cs) | add a custom x trace id header generated from a distributed tracing system for end to end monitoring |
| [add-a-custom-x-user-id-header-to-associate-the-email-with-an-internal-user-identifier.cs](./add-a-custom-x-user-id-header-to-associate-the-email-with-an-internal-user-identifier.cs) | add a custom x user id header to associate the email with an internal user identifier |
| [add-a-high-priority-header-to-an-outgoing-message-before-transmitting-via-the-smtp-client.cs](./add-a-high-priority-header-to-an-outgoing-message-before-transmitting-via-the-smtp-client.cs) | add a high priority header to an outgoing message before transmitting via the smtp client |
| [add-a-list-unsubscribe-header-to-enable-recipients-to-opt-out-directly-from-the-email-client.cs](./add-a-list-unsubscribe-header-to-enable-recipients-to-opt-out-directly-from-the-email-client.cs) | add a list unsubscribe header to enable recipients to opt out directly from the email client |
| [add-a-read-receipt-request-header-to-the-outgoing-message-to-track-when-recipients-open-it.cs](./add-a-read-receipt-request-header-to-the-outgoing-message-to-track-when-recipients-open-it.cs) | add a read receipt request header to the outgoing message to track when recipients open it |
| [adjust-operation-timeout-based-on-network-latency-measurements-to-avoid-unnecessary-email-delivery-delays.cs](./adjust-operation-timeout-based-on-network-latency-measurements-to-avoid-unnecessary-email-delivery-delays.cs) | adjust operation timeout based on network latency measurements to avoid unnecessary email delivery delays |
| [adjust-smtpclient-timeout-dynamically-based-on-email-size-to-prevent-premature-termination.cs](./adjust-smtpclient-timeout-dynamically-based-on-email-size-to-prevent-premature-termination.cs) | adjust smtpclient timeout dynamically based on email size to prevent premature termination |
| [apply-a-content-filter-that-removes-prohibited-words-from-the-email-body-before-sending.cs](./apply-a-content-filter-that-removes-prohibited-words-from-the-email-body-before-sending.cs) | apply a content filter that removes prohibited words from the email body before sending |
| [apply-a-custom-certificate-validation-callback-to-accept-self-signed-certificates-during-tls-handshake.cs](./apply-a-custom-certificate-validation-callback-to-accept-self-signed-certificates-during-tls-handshake.cs) | apply a custom certificate validation callback to accept self signed certificates during tls handshake |
| [apply-a-custom-dkim-signing-routine-to-the-message-before-transmitting-via-the-smtp-client.cs](./apply-a-custom-dkim-signing-routine-to-the-message-before-transmitting-via-the-smtp-client.cs) | apply a custom dkim signing routine to the message before transmitting via the smtp client |
| [apply-a-custom-email-address-normalization-routine-to-standardize-case-and-remove-display-names.cs](./apply-a-custom-email-address-normalization-routine-to-standardize-case-and-remove-display-names.cs) | apply a custom email address normalization routine to standardize case and remove display names |
| [apply-a-retry-policy-that-attempts-to-resend-a-failed-message-up-to-three-times-with-exponential-backoff.cs](./apply-a-retry-policy-that-attempts-to-resend-a-failed-message-up-to-three-times-with-exponential-backoff.cs) | apply a retry policy that attempts to resend a failed message up to three times with exponential backoff |
| [attach-a-pdf-document-from-a-memory-stream-to-an-email-and-transmit-it-using-tls-encryption.cs](./attach-a-pdf-document-from-a-memory-stream-to-an-email-and-transmit-it-using-tls-encryption.cs) | attach a pdf document from a memory stream to an email and transmit it using tls encryption |
| [authenticate-to-the-smtp-server-using-cram-md5-by-setting-authenticationtype-property.cs](./authenticate-to-the-smtp-server-using-cram-md5-by-setting-authenticationtype-property.cs) | authenticate to the smtp server using cram md5 by setting authenticationtype property |
| [bind-the-smtp-client-to-a-specific-local-ip-address-using-bindipendpoint.cs](./bind-the-smtp-client-to-a-specific-local-ip-address-using-bindipendpoint.cs) | bind the smtp client to a specific local ip address using bindipendpoint |
| [bind-the-smtp-client-to-the-ipv6-address-of-the-host-machine-for-dual-stack-compatibility.cs](./bind-the-smtp-client-to-the-ipv6-address-of-the-host-machine-for-dual-stack-compatibility.cs) | bind the smtp client to the ipv6 address of the host machine for dual stack compatibility |
| [configure-a-maximum-attachment-size-limit-of-10-mb-and-reject-oversized-files-before-sending.cs](./configure-a-maximum-attachment-size-limit-of-10-mb-and-reject-oversized-files-before-sending.cs) | configure a maximum attachment size limit of 10 mb and reject oversized files before sending |
| [configure-a-socks-proxy-with-username-and-password-to-authenticate-the-client-before-establishing-smtp-connection.cs](./configure-a-socks-proxy-with-username-and-password-to-authenticate-the-client-before-establishing-smtp-connection.cs) | configure a socks proxy with username and password to authenticate the client before establishing smtp connection |
| [configure-smtpclient-proxy-with-a-socks5-server-to-route-email-traffic-securely.cs](./configure-smtpclient-proxy-with-a-socks5-server-to-route-email-traffic-securely.cs) | configure smtpclient proxy with a socks5 server to route email traffic securely |
| [configure-smtpclient-to-automatically-select-the-most-secure-authentication-method-from-the-server-supported-list.cs](./configure-smtpclient-to-automatically-select-the-most-secure-authentication-method-from-the-server-supported-list.cs) | configure smtpclient to automatically select the most secure authentication method from the server supported list |
| [configure-smtpclient-to-fallback-to-plain-authentication-if-cram-md5-is-not-supported-by-the-server.cs](./configure-smtpclient-to-fallback-to-plain-authentication-if-cram-md5-is-not-supported-by-the-server.cs) | configure smtpclient to fallback to plain authentication if cram md5 is not supported by the server |
| [configure-smtpclient-to-use-a-socks-proxy-with-authentication-credentials-for-secure-access.cs](./configure-smtpclient-to-use-a-socks-proxy-with-authentication-credentials-for-secure-access.cs) | configure smtpclient to use a socks proxy with authentication credentials for secure access |
| [configure-smtpclient-to-use-cram-md5-authentication-only-when-the-server-advertises-it.cs](./configure-smtpclient-to-use-cram-md5-authentication-only-when-the-server-advertises-it.cs) | configure smtpclient to use cram md5 authentication only when the server advertises it |
| [configure-smtpclient-with-a-60-second-operation-timeout-for-large-email-batches.cs](./configure-smtpclient-with-a-60-second-operation-timeout-for-large-email-batches.cs) | configure smtpclient with a 60 second operation timeout for large email batches |
| [configure-smtpclient-with-host-port-and-security-settings-then-send-an-email-loaded-from-an-msg-file.cs](./configure-smtpclient-with-host-port-and-security-settings-then-send-an-email-loaded-from-an-msg-file.cs) | configure smtpclient with host port and security settings then send an email loaded from an msg file |
| [configure-socket-timeout-to-30-seconds-to-prevent-hanging-connections-during-smtp-transmission.cs](./configure-socket-timeout-to-30-seconds-to-prevent-hanging-connections-during-smtp-transmission.cs) | configure socket timeout to 30 seconds to prevent hanging connections during smtp transmission |
| [configure-the-client-to-automatically-add-a-date-header-with-utc-time-if-missing.cs](./configure-the-client-to-automatically-add-a-date-header-with-utc-time-if-missing.cs) | configure the client to automatically add a date header with utc time if missing |
| [configure-the-client-to-automatically-add-a-list-id-header-for-mailing-list-identification.cs](./configure-the-client-to-automatically-add-a-list-id-header-for-mailing-list-identification.cs) | configure the client to automatically add a list id header for mailing list identification |
| [configure-the-client-to-automatically-add-a-list-unsubscribe-post-header-for-one-click-unsubscribe-support.cs](./configure-the-client-to-automatically-add-a-list-unsubscribe-post-header-for-one-click-unsubscribe-support.cs) | configure the client to automatically add a list unsubscribe post header for one click unsubscribe support |
| [configure-the-client-to-automatically-add-a-message-id-header-if-one-is-not-already-present.cs](./configure-the-client-to-automatically-add-a-message-id-header-if-one-is-not-already-present.cs) | configure the client to automatically add a message id header if one is not already present |
| [configure-the-client-to-automatically-compress-attachments-larger-than-1-mb-using-gzip-before-sending.cs](./configure-the-client-to-automatically-compress-attachments-larger-than-1-mb-using-gzip-before-sending.cs) | configure the client to automatically compress attachments larger than 1 mb using gzip before sending |
| [configure-the-client-to-automatically-remove-any-duplicate-recipients-from-the-to-cc-and-bcc-lists.cs](./configure-the-client-to-automatically-remove-any-duplicate-recipients-from-the-to-cc-and-bcc-lists.cs) | configure the client to automatically remove any duplicate recipients from the to cc and bcc lists |
| [configure-the-client-to-automatically-remove-any-empty-recipient-fields-to-prevent-smtp-errors-during-send.cs](./configure-the-client-to-automatically-remove-any-empty-recipient-fields-to-prevent-smtp-errors-during-send.cs) | configure the client to automatically remove any empty recipient fields to prevent smtp errors during send |
| [configure-the-client-to-automatically-retry-sending-when-encountering-transient-4xx-smtp-error-codes.cs](./configure-the-client-to-automatically-retry-sending-when-encountering-transient-4xx-smtp-error-codes.cs) | configure the client to automatically retry sending when encountering transient 4xx smtp error codes |
| [configure-the-client-to-automatically-strip-html-tags-from-the-body-when-sending-to-plain-text-only-recipients.cs](./configure-the-client-to-automatically-strip-html-tags-from-the-body-when-sending-to-plain-text-only-recipients.cs) | configure the client to automatically strip html tags from the body when sending to plain text only recipients |
| [configure-the-client-to-reuse-a-single-smtp-connection-for-sending-a-batch-of-fifty-messages.cs](./configure-the-client-to-reuse-a-single-smtp-connection-for-sending-a-batch-of-fifty-messages.cs) | configure the client to reuse a single smtp connection for sending a batch of fifty messages |
| [configure-the-client-to-use-a-specific-tls-protocol-version-such-as-tls-1-2-for-secure-connections.cs](./configure-the-client-to-use-a-specific-tls-protocol-version-such-as-tls-1-2-for-secure-connections.cs) | configure the client to use a specific tls protocol version such as tls 1 2 for secure connections |
| [configure-the-smtp-client-to-ignore-certificate-revocation-checks-for-testing-environments.cs](./configure-the-smtp-client-to-ignore-certificate-revocation-checks-for-testing-environments.cs) | configure the smtp client to ignore certificate revocation checks for testing environments |
| [configure-the-smtp-client-to-use-a-connection-timeout-of-10-seconds-and-a-read-timeout-of-30-seconds.cs](./configure-the-smtp-client-to-use-a-connection-timeout-of-10-seconds-and-a-read-timeout-of-30-seconds.cs) | configure the smtp client to use a connection timeout of 10 seconds and a read timeout of 30 seconds |
| [configure-the-smtp-client-to-use-a-custom-dns-resolver-that-prefers-ipv6-over-ipv4-addresses.cs](./configure-the-smtp-client-to-use-a-custom-dns-resolver-that-prefers-ipv6-over-ipv4-addresses.cs) | configure the smtp client to use a custom dns resolver that prefers ipv6 over ipv4 addresses |
| [configure-the-smtp-client-to-use-a-custom-retry-interval-of-15-seconds-between-each-resend-attempt.cs](./configure-the-smtp-client-to-use-a-custom-retry-interval-of-15-seconds-between-each-resend-attempt.cs) | configure the smtp client to use a custom retry interval of 15 seconds between each resend attempt |
| [configure-the-smtp-client-to-use-a-proxy-server-for-routing-all-email-traffic-securely.cs](./configure-the-smtp-client-to-use-a-proxy-server-for-routing-all-email-traffic-securely.cs) | configure the smtp client to use a proxy server for routing all email traffic securely |
| [configure-the-smtp-client-to-use-a-specific-authentication-realm-when-connecting-to-the-server.cs](./configure-the-smtp-client-to-use-a-specific-authentication-realm-when-connecting-to-the-server.cs) | configure the smtp client to use a specific authentication realm when connecting to the server |
| [configure-the-smtp-client-to-use-a-specific-local-ip-address-for-outbound-connections.cs](./configure-the-smtp-client-to-use-a-specific-local-ip-address-for-outbound-connections.cs) | configure the smtp client to use a specific local ip address for outbound connections |
| [configure-the-smtp-client-to-use-a-specific-network-interface-for-outbound-traffic-on-multi-homed-servers.cs](./configure-the-smtp-client-to-use-a-specific-network-interface-for-outbound-traffic-on-multi-homed-servers.cs) | configure the smtp client to use a specific network interface for outbound traffic on multi homed servers |
| [configure-the-smtp-client-to-use-ntlm-authentication-with-domain-credentials-for-secure-login.cs](./configure-the-smtp-client-to-use-ntlm-authentication-with-domain-credentials-for-secure-login.cs) | configure the smtp client to use ntlm authentication with domain credentials for secure login |
| [configure-the-smtpclient-s-log-level-to-detailed-to-aid-troubleshooting-when-transmitting-msg-format-emails.cs](./configure-the-smtpclient-s-log-level-to-detailed-to-aid-troubleshooting-when-transmitting-msg-format-emails.cs) | configure the smtpclient s log level to detailed to aid troubleshooting when transmitting msg format emails |
| [configure-the-smtpclient-to-log-smtp-operations-by-specifying-a-logfile-path-and-loglevel-during-msg-email-loading.cs](./configure-the-smtpclient-to-log-smtp-operations-by-specifying-a-logfile-path-and-loglevel-during-msg-email-loading.cs) | configure the smtpclient to log smtp operations by specifying a logfile path and loglevel during msg email loading |
| [create-a-template-engine-that-replaces-placeholders-with-user-data-before-sending-the-email.cs](./create-a-template-engine-that-replaces-placeholders-with-user-data-before-sending-the-email.cs) | create a template engine that replaces placeholders with user data before sending the email |
| [create-an-email-from-an-msg-file-using-mailmessage-then-transmit-it-via-smtpclient.cs](./create-an-email-from-an-msg-file-using-mailmessage-then-transmit-it-via-smtpclient.cs) | create an email from an msg file using mailmessage then transmit it via smtpclient |
| [create-an-smtp-client-using-configuration-extracted-from-an-msg-file-and-transmit-the-email.cs](./create-an-smtp-client-using-configuration-extracted-from-an-msg-file-and-transmit-the-email.cs) | create an smtp client using configuration extracted from an msg file and transmit the email |
| [enable-delivery-status-notifications-for-success-failure-and-delay-events-on-each-outgoing-email.cs](./enable-delivery-status-notifications-for-success-failure-and-delay-events-on-each-outgoing-email.cs) | enable delivery status notifications for success failure and delay events on each outgoing email |
| [enable-detailed-smtp-activity-logging-and-write-the-log-entries-to-a-rotating-file-system.cs](./enable-detailed-smtp-activity-logging-and-write-the-log-entries-to-a-rotating-file-system.cs) | enable detailed smtp activity logging and write the log entries to a rotating file system |
| [enable-keep-alive-on-the-smtp-connection-to-reduce-handshake-overhead-for-consecutive-messages.cs](./enable-keep-alive-on-the-smtp-connection-to-reduce-handshake-overhead-for-consecutive-messages.cs) | enable keep alive on the smtp connection to reduce handshake overhead for consecutive messages |
| [enable-smtp-communication-logging-for-email-transmission-specifying-logfile-and-loglevel-settings-with-an-msg-source.cs](./enable-smtp-communication-logging-for-email-transmission-specifying-logfile-and-loglevel-settings-with-an-msg-source.cs) | enable smtp communication logging for email transmission specifying logfile and loglevel settings with an msg source |
| [enable-smtp-pipelining-to-send-multiple-commands-without-waiting-for-individual-server-responses.cs](./enable-smtp-pipelining-to-send-multiple-commands-without-waiting-for-individual-server-responses.cs) | enable smtp pipelining to send multiple commands without waiting for individual server responses |
| [enable-smtp-protocol-logging-and-transmit-an-email-message-loaded-from-an-msg-file.cs](./enable-smtp-protocol-logging-and-transmit-an-email-message-loaded-from-an-msg-file.cs) | enable smtp protocol logging and transmit an email message loaded from an msg file |
| [enable-ssl-tls-encryption-on-smtpclient-by-setting-securityoptions-to-sslexplicit.cs](./enable-ssl-tls-encryption-on-smtpclient-by-setting-securityoptions-to-sslexplicit.cs) | enable ssl tls encryption on smtpclient by setting securityoptions to sslexplicit |
| [enable-starttls-negotiation-on-port-587-to-upgrade-an-insecure-connection-to-a-secure-channel.cs](./enable-starttls-negotiation-on-port-587-to-upgrade-an-insecure-connection-to-a-secure-channel.cs) | enable starttls negotiation on port 587 to upgrade an insecure connection to a secure channel |
| [enable-tls-1-2-by-setting-securityoptions-to-sslexplicit-and-verify-server-certificate-chain.cs](./enable-tls-1-2-by-setting-securityoptions-to-sslexplicit-and-verify-server-certificate-chain.cs) | enable tls 1 2 by setting securityoptions to sslexplicit and verify server certificate chain |
| [forward-a-loaded-msg-mailmessage-to-additional-recipients-by-calling-the-mailmessage-forward-method-preserving-original-content.cs](./forward-a-loaded-msg-mailmessage-to-additional-recipients-by-calling-the-mailmessage-forward-method-preserving-original-content.cs) | forward a loaded msg mailmessage to additional recipients by calling the mailmessage forward method preserving original content |
| [forward-an-existing-message-to-multiple-recipients-while-preserving-original-headers-and-attachments.cs](./forward-an-existing-message-to-multiple-recipients-while-preserving-original-headers-and-attachments.cs) | forward an existing message to multiple recipients while preserving original headers and attachments |
| [implement-a-callback-that-logs-the-time-taken-for-each-smtp-command-execution.cs](./implement-a-callback-that-logs-the-time-taken-for-each-smtp-command-execution.cs) | implement a callback that logs the time taken for each smtp command execution |
| [implement-a-fallback-mechanism-that-switches-to-an-alternate-smtp-host-if-the-primary-server-fails.cs](./implement-a-fallback-mechanism-that-switches-to-an-alternate-smtp-host-if-the-primary-server-fails.cs) | implement a fallback mechanism that switches to an alternate smtp host if the primary server fails |
| [implement-a-feature-that-compresses-the-entire-mime-message-using-gzip-before-sending-over-smtp.cs](./implement-a-feature-that-compresses-the-entire-mime-message-using-gzip-before-sending-over-smtp.cs) | implement a feature that compresses the entire mime message using gzip before sending over smtp |
| [implement-a-feature-that-logs-the-size-of-each-attachment-before-it-is-added-to-the-email.cs](./implement-a-feature-that-logs-the-size-of-each-attachment-before-it-is-added-to-the-email.cs) | implement a feature that logs the size of each attachment before it is added to the email |
| [implement-a-feature-that-validates-spf-records-for-the-sending-domain-before-attempting-smtp-delivery.cs](./implement-a-feature-that-validates-spf-records-for-the-sending-domain-before-attempting-smtp-delivery.cs) | implement a feature that validates spf records for the sending domain before attempting smtp delivery |
| [implement-a-logging-interceptor-that-records-the-size-of-each-email-payload-before-transmission.cs](./implement-a-logging-interceptor-that-records-the-size-of-each-email-payload-before-transmission.cs) | implement a logging interceptor that records the size of each email payload before transmission |
| [implement-a-mechanism-that-encrypts-attachments-using-aes-before-adding-them-to-the-email.cs](./implement-a-mechanism-that-encrypts-attachments-using-aes-before-adding-them-to-the-email.cs) | implement a mechanism that encrypts attachments using aes before adding them to the email |
| [implement-a-mechanism-that-encrypts-the-smtp-session-using-starttls-only-after-verifying-server-certificate-fingerpri.cs](./implement-a-mechanism-that-encrypts-the-smtp-session-using-starttls-only-after-verifying-server-certificate-fingerpri.cs) | implement a mechanism that encrypts the smtp session using starttls only after verifying server certificate fingerpri |
| [implement-a-mechanism-that-logs-the-smtp-server-banner-message-upon-establishing-the-connection.cs](./implement-a-mechanism-that-logs-the-smtp-server-banner-message-upon-establishing-the-connection.cs) | implement a mechanism that logs the smtp server banner message upon establishing the connection |
| [implement-a-mechanism-that-pauses-sending-when-the-server-returns-a-421-response-then-resumes-after-delay.cs](./implement-a-mechanism-that-pauses-sending-when-the-server-returns-a-421-response-then-resumes-after-delay.cs) | implement a mechanism that pauses sending when the server returns a 421 response then resumes after delay |
| [implement-a-mechanism-that-queues-messages-locally-when-the-smtp-server-is-unreachable-then-retries-later.cs](./implement-a-mechanism-that-queues-messages-locally-when-the-smtp-server-is-unreachable-then-retries-later.cs) | implement a mechanism that queues messages locally when the smtp server is unreachable then retries later |
| [implement-a-method-that-checks-server-supported-authentication-mechanisms-and-selects-the-strongest-available-option.cs](./implement-a-method-that-checks-server-supported-authentication-mechanisms-and-selects-the-strongest-available-option.cs) | implement a method that checks server supported authentication mechanisms and selects the strongest available option |
| [implement-a-policy-that-rejects-sending-messages-larger-than-25-mb-to-comply-with-server-limits.cs](./implement-a-policy-that-rejects-sending-messages-larger-than-25-mb-to-comply-with-server-limits.cs) | implement a policy that rejects sending messages larger than 25 mb to comply with server limits |
| [implement-a-progress-reporter-that-updates-after-each-email-is-successfully-transmitted-over-smtp.cs](./implement-a-progress-reporter-that-updates-after-each-email-is-successfully-transmitted-over-smtp.cs) | implement a progress reporter that updates after each email is successfully transmitted over smtp |
| [implement-a-retry-delay-that-respects-the-smtp-server-retry-after-header-when-present.cs](./implement-a-retry-delay-that-respects-the-smtp-server-retry-after-header-when-present.cs) | implement a retry delay that respects the smtp server retry after header when present |
| [implement-a-retry-policy-that-increases-greetingtimeout-after-each-failed-connection-attempt.cs](./implement-a-retry-policy-that-increases-greetingtimeout-after-each-failed-connection-attempt.cs) | implement a retry policy that increases greetingtimeout after each failed connection attempt |
| [implement-a-retry-strategy-that-respects-the-server-retry-after-header-and-backs-off-exponentially.cs](./implement-a-retry-strategy-that-respects-the-server-retry-after-header-and-backs-off-exponentially.cs) | implement a retry strategy that respects the server retry after header and backs off exponentially |
| [implement-a-watchdog-that-aborts-the-smtp-send-operation-if-it-exceeds-a-configurable-time-limit.cs](./implement-a-watchdog-that-aborts-the-smtp-send-operation-if-it-exceeds-a-configurable-time-limit.cs) | implement a watchdog that aborts the smtp send operation if it exceeds a configurable time limit |
| [implement-a-watchdog-that-monitors-smtp-server-response-times-and-raises-alerts-if-they-exceed-thresholds.cs](./implement-a-watchdog-that-monitors-smtp-server-response-times-and-raises-alerts-if-they-exceed-thresholds.cs) | implement a watchdog that monitors smtp server response times and raises alerts if they exceed thresholds |
| [implement-asynchronous-email-sending-with-cancellation-token-support-to-allow-graceful-abort-of-the-operation.cs](./implement-asynchronous-email-sending-with-cancellation-token-support-to-allow-graceful-abort-of-the-operation.cs) | implement asynchronous email sending with cancellation token support to allow graceful abort of the operation |
| [implement-credential-validation-logic-that-attempts-a-silent-login-before-sending-any-message-to-ensure-correctness.cs](./implement-credential-validation-logic-that-attempts-a-silent-login-before-sending-any-message-to-ensure-correctness.cs) | implement credential validation logic that attempts a silent login before sending any message to ensure correctness |
| [implement-dns-cache-to-store-mx-lookup-results-for-ten-minutes-reducing-lookup-latency.cs](./implement-dns-cache-to-store-mx-lookup-results-for-ten-minutes-reducing-lookup-latency.cs) | implement dns cache to store mx lookup results for ten minutes reducing lookup latency |
| [implement-event-handlers-that-log-smtp-server-responses-after-each-command-issued-by-the-client.cs](./implement-event-handlers-that-log-smtp-server-responses-after-each-command-issued-by-the-client.cs) | implement event handlers that log smtp server responses after each command issued by the client |
| [implement-parallel-sending-of-a-list-of-messages-using-multiple-smtp-client-instances-for-improved-throughput.cs](./implement-parallel-sending-of-a-list-of-messages-using-multiple-smtp-client-instances-for-improved-throughput.cs) | implement parallel sending of a list of messages using multiple smtp client instances for improved throughput |
| [increase-greetingtimeout-to-ten-seconds-for-servers-known-to-have-delayed-initial-responses-during-peak-hours.cs](./increase-greetingtimeout-to-ten-seconds-for-servers-known-to-have-delayed-initial-responses-during-peak-hours.cs) | increase greetingtimeout to ten seconds for servers known to have delayed initial responses during peak hours |
| [instantiate-a-mailmessage-populate-from-to-subject-and-body-fields-from-an-msg-template-then-dispatch-using-smtpclient.cs](./instantiate-a-mailmessage-populate-from-to-subject-and-body-fields-from-an-msg-template-then-dispatch-using-smtpclient.cs) | instantiate a mailmessage populate from to subject and body fields from an msg template then dispatch using smtpclient |
| [load-an-msg-file-into-a-mailmessage-instance-and-transmit-it-using-the-smtpclient-send.cs](./load-an-msg-file-into-a-mailmessage-instance-and-transmit-it-using-the-smtpclient-send.cs) | load an msg file into a mailmessage instance and transmit it using the smtpclient send |
| [load-an-msg-file-into-a-mailmessage-object-and-forward-the-message-by-invoking-its-forward-method.cs](./load-an-msg-file-into-a-mailmessage-object-and-forward-the-message-by-invoking-its-forward-method.cs) | load an msg file into a mailmessage object and forward the message by invoking its forward method |
| [load-credentials-from-an-encrypted-configuration-file-decrypt-them-then-assign-to-smtpclient.cs](./load-credentials-from-an-encrypted-configuration-file-decrypt-them-then-assign-to-smtpclient.cs) | load credentials from an encrypted configuration file decrypt them then assign to smtpclient |
| [load-smtp-authentication-credentials-from-a-json-configuration-file-using-loadcredentialsfromconfig.cs](./load-smtp-authentication-credentials-from-a-json-configuration-file-using-loadcredentialsfromconfig.cs) | load smtp authentication credentials from a json configuration file using loadcredentialsfromconfig |
| [load-smtp-credentials-from-an-xml-file-map-them-to-networkcredential-and-assign-to-smtpclient.cs](./load-smtp-credentials-from-an-xml-file-map-them-to-networkcredential-and-assign-to-smtpclient.cs) | load smtp credentials from an xml file map them to networkcredential and assign to smtpclient |
| [log-each-smtp-command-and-server-response-to-a-database-table-for-audit-purposes.cs](./log-each-smtp-command-and-server-response-to-a-database-table-for-audit-purposes.cs) | log each smtp command and server response to a database table for audit purposes |
| [query-the-smtp-server-for-available-extensions-with-getextensions-and-store-them-for-later-capability-checks.cs](./query-the-smtp-server-for-available-extensions-with-getextensions-and-store-them-for-later-capability-checks.cs) | query the smtp server for available extensions with getextensions and store them for later capability checks |
| [retrieve-and-display-the-full-list-of-smtp-server-extensions-for-diagnostic-purposes-in-a-console-application.cs](./retrieve-and-display-the-full-list-of-smtp-server-extensions-for-diagnostic-purposes-in-a-console-application.cs) | retrieve and display the full list of smtp server extensions for diagnostic purposes in a console application |
| [retrieve-and-log-supported-authentication-methods-from-the-mail-server-using-getsupportedauthenticationmethods.cs](./retrieve-and-log-supported-authentication-methods-from-the-mail-server-using-getsupportedauthenticationmethods.cs) | retrieve and log supported authentication methods from the mail server using getsupportedauthenticationmethods |
| [retrieve-server-extensions-and-conditionally-enable-starttls-if-the-starttls-extension-is-present.cs](./retrieve-server-extensions-and-conditionally-enable-starttls-if-the-starttls-extension-is-present.cs) | retrieve server extensions and conditionally enable starttls if the starttls extension is present |
| [retrieve-server-extensions-and-store-them-in-a-dictionary-for-quick-lookup-during-email-composition.cs](./retrieve-server-extensions-and-store-them-in-a-dictionary-for-quick-lookup-during-email-composition.cs) | retrieve server extensions and store them in a dictionary for quick lookup during email composition |
| [send-a-calendar-invitation-icalendar-as-an-alternative-view-attached-to-the-email-message.cs](./send-a-calendar-invitation-icalendar-as-an-alternative-view-attached-to-the-email-message.cs) | send a calendar invitation icalendar as an alternative view attached to the email message |
| [send-a-message-with-a-custom-mime-boundary-to-satisfy-a-legacy-mail-system-parsing-rules.cs](./send-a-message-with-a-custom-mime-boundary-to-satisfy-a-legacy-mail-system-parsing-rules.cs) | send a message with a custom mime boundary to satisfy a legacy mail system parsing rules |
| [send-a-message-with-a-custom-mime-type-application-vnd-custom-json-for-specialized-payload-delivery.cs](./send-a-message-with-a-custom-mime-type-application-vnd-custom-json-for-specialized-payload-delivery.cs) | send a message with a custom mime type application vnd custom json for specialized payload delivery |
| [send-a-message-with-a-custom-x-auto-response-suppress-header-to-prevent-automatic-replies.cs](./send-a-message-with-a-custom-x-auto-response-suppress-header-to-prevent-automatic-replies.cs) | send a message with a custom x auto response suppress header to prevent automatic replies |
| [send-a-message-with-a-custom-x-precedence-header-set-to-bulk-for-mass-mail-campaigns.cs](./send-a-message-with-a-custom-x-precedence-header-set-to-bulk-for-mass-mail-campaigns.cs) | send a message with a custom x precedence header set to bulk for mass mail campaigns |
| [send-a-message-with-a-custom-x-priority-level-header-set-to-urgent-for-time-sensitive-notifications.cs](./send-a-message-with-a-custom-x-priority-level-header-set-to-urgent-for-time-sensitive-notifications.cs) | send a message with a custom x priority level header set to urgent for time sensitive notifications |
| [send-a-message-with-a-custom-x-retention-policy-header-specifying-how-long-the-email-should-be-retained.cs](./send-a-message-with-a-custom-x-retention-policy-header-specifying-how-long-the-email-should-be-retained.cs) | send a message with a custom x retention policy header specifying how long the email should be retained |
| [send-a-message-with-a-delayed-delivery-time-by-setting-the-date-header-to-a-future-timestamp.cs](./send-a-message-with-a-delayed-delivery-time-by-setting-the-date-header-to-a-future-timestamp.cs) | send a message with a delayed delivery time by setting the date header to a future timestamp |
| [send-a-message-with-a-large-attachment-split-into-multiple-mime-parts-using-the-message-partial-type.cs](./send-a-message-with-a-large-attachment-split-into-multiple-mime-parts-using-the-message-partial-type.cs) | send a message with a large attachment split into multiple mime parts using the message partial type |
| [send-a-message-with-a-multipart-mixed-body-that-includes-both-a-text-part-and-a-binary-attachment.cs](./send-a-message-with-a-multipart-mixed-body-that-includes-both-a-text-part-and-a-binary-attachment.cs) | send a message with a multipart mixed body that includes both a text part and a binary attachment |
| [send-a-message-with-a-multipart-related-body-that-includes-an-html-part-and-embedded-css-resources.cs](./send-a-message-with-a-multipart-related-body-that-includes-an-html-part-and-embedded-css-resources.cs) | send a message with a multipart related body that includes an html part and embedded css resources |
| [send-a-message-with-a-signed-dkim-header-generated-from-a-private-key-stored-in-a-secure-vault.cs](./send-a-message-with-a-signed-dkim-header-generated-from-a-private-key-stored-in-a-secure-vault.cs) | send a message with a signed dkim header generated from a private key stored in a secure vault |
| [send-a-message-with-an-attached-csv-file-generated-from-a-datatable-without-writing-to-disk.cs](./send-a-message-with-an-attached-csv-file-generated-from-a-datatable-without-writing-to-disk.cs) | send a message with an attached csv file generated from a datatable without writing to disk |
| [send-a-message-with-multiple-bcc-recipients-while-keeping-their-addresses-hidden-from-other-recipients.cs](./send-a-message-with-multiple-bcc-recipients-while-keeping-their-addresses-hidden-from-other-recipients.cs) | send a message with multiple bcc recipients while keeping their addresses hidden from other recipients |
| [send-a-multipart-alternative-email-that-includes-both-plain-text-and-html-versions-for-client-compatibility.cs](./send-a-multipart-alternative-email-that-includes-both-plain-text-and-html-versions-for-client-compatibility.cs) | send a multipart alternative email that includes both plain text and html versions for client compatibility |
| [send-a-plain-text-email-through-an-smtp-server-using-explicit-ssl-on-port-465.cs](./send-a-plain-text-email-through-an-smtp-server-using-explicit-ssl-on-port-465.cs) | send a plain text email through an smtp server using explicit ssl on port 465 |
| [send-an-email-with-a-compressed-zip-attachment-ensuring-the-attachment-size-does-not-exceed-5-mb.cs](./send-an-email-with-a-compressed-zip-attachment-ensuring-the-attachment-size-does-not-exceed-5-mb.cs) | send an email with a compressed zip attachment ensuring the attachment size does not exceed 5 mb |
| [send-an-email-with-a-custom-x-language-header-indicating-the-primary-language-of-the-message-content.cs](./send-an-email-with-a-custom-x-language-header-indicating-the-primary-language-of-the-message-content.cs) | send an email with a custom x language header indicating the primary language of the message content |
| [send-an-email-with-a-dynamically-generated-pdf-attachment-created-from-html-content-at-runtime.cs](./send-an-email-with-a-dynamically-generated-pdf-attachment-created-from-html-content-at-runtime.cs) | send an email with a dynamically generated pdf attachment created from html content at runtime |
| [send-an-email-with-a-dynamically-generated-qr-code-image-embedded-as-an-inline-attachment.cs](./send-an-email-with-a-dynamically-generated-qr-code-image-embedded-as-an-inline-attachment.cs) | send an email with a dynamically generated qr code image embedded as an inline attachment |
| [send-an-email-with-a-multipart-alternative-body-that-includes-both-plain-text-and-rtf-versions.cs](./send-an-email-with-a-multipart-alternative-body-that-includes-both-plain-text-and-rtf-versions.cs) | send an email with a multipart alternative body that includes both plain text and rtf versions |
| [send-an-email-with-a-multipart-mixed-body-that-includes-a-json-payload-attachment-for-api-integration.cs](./send-an-email-with-a-multipart-mixed-body-that-includes-a-json-payload-attachment-for-api-integration.cs) | send an email with a multipart mixed body that includes a json payload attachment for api integration |
| [send-an-email-with-a-multipart-mixed-body-that-includes-a-text-part-html-part-and-attachment.cs](./send-an-email-with-a-multipart-mixed-body-that-includes-a-text-part-html-part-and-attachment.cs) | send an email with a multipart mixed body that includes a text part html part and attachment |
| [send-an-email-with-a-plain-text-body-encoded-in-iso-8859-1-for-legacy-client-compatibility.cs](./send-an-email-with-a-plain-text-body-encoded-in-iso-8859-1-for-legacy-client-compatibility.cs) | send an email with a plain text body encoded in iso 8859 1 for legacy client compatibility |
| [send-an-email-with-a-plain-text-fallback-body-for-clients-that-cannot-render-html-content.cs](./send-an-email-with-a-plain-text-fallback-body-for-clients-that-cannot-render-html-content.cs) | send an email with a plain text fallback body for clients that cannot render html content |
| [send-an-email-with-a-signed-s-mime-part-to-provide-message-integrity-and-authenticity.cs](./send-an-email-with-a-signed-s-mime-part-to-provide-message-integrity-and-authenticity.cs) | send an email with a signed s mime part to provide message integrity and authenticity |
| [send-an-html-email-containing-inline-images-by-embedding-them-as-linked-resources-in-the-message.cs](./send-an-html-email-containing-inline-images-by-embedding-them-as-linked-resources-in-the-message.cs) | send an html email containing inline images by embedding them as linked resources in the message |
| [serialize-email-message-to-eml-format-before-sending-to-allow-pre-send-inspection-and-logging.cs](./serialize-email-message-to-eml-format-before-sending-to-allow-pre-send-inspection-and-logging.cs) | serialize email message to eml format before sending to allow pre send inspection and logging |
| [set-a-custom-greeting-timeout-of-three-seconds-to-speed-up-connections-to-fast-responding-mail-servers.cs](./set-a-custom-greeting-timeout-of-three-seconds-to-speed-up-connections-to-fast-responding-mail-servers.cs) | set a custom greeting timeout of three seconds to speed up connections to fast responding mail servers |
| [set-a-custom-operation-timeout-of-two-minutes-for-sending-large-attachments-to-prevent-premature-failures.cs](./set-a-custom-operation-timeout-of-two-minutes-for-sending-large-attachments-to-prevent-premature-failures.cs) | set a custom operation timeout of two minutes for sending large attachments to prevent premature failures |
| [set-a-custom-timeout-for-the-authentication-phase-to-avoid-long-waits-on-invalid-credentials.cs](./set-a-custom-timeout-for-the-authentication-phase-to-avoid-long-waits-on-invalid-credentials.cs) | set a custom timeout for the authentication phase to avoid long waits on invalid credentials |
| [set-a-custom-x-mailing-id-header-on-each-message-to-facilitate-downstream-tracking.cs](./set-a-custom-x-mailing-id-header-on-each-message-to-facilitate-downstream-tracking.cs) | set a custom x mailing id header on each message to facilitate downstream tracking |
| [set-smtpclient-greetingtimeout-to-five-seconds-to-reduce-initial-connection-latency.cs](./set-smtpclient-greetingtimeout-to-five-seconds-to-reduce-initial-connection-latency.cs) | set smtpclient greetingtimeout to five seconds to reduce initial connection latency |
| [set-smtpclient-securityoptions-to-autodetect-to-let-the-client-negotiate-the-best-encryption-protocol-automatically.cs](./set-smtpclient-securityoptions-to-autodetect-to-let-the-client-negotiate-the-best-encryption-protocol-automatically.cs) | set smtpclient securityoptions to autodetect to let the client negotiate the best encryption protocol automatically |
| [set-the-email-body-encoding-to-utf-8-to-support-international-characters-in-the-message-content.cs](./set-the-email-body-encoding-to-utf-8-to-support-international-characters-in-the-message-content.cs) | set the email body encoding to utf 8 to support international characters in the message content |
| [set-the-email-sensitivity-header-to-private-to-indicate-confidential-content-to-recipients.cs](./set-the-email-sensitivity-header-to-private-to-indicate-confidential-content-to-recipients.cs) | set the email sensitivity header to private to indicate confidential content to recipients |
| [set-the-enablessl-property-on-the-smtp-client-to-enable-ssl-before-transmitting-msg-formatted-messages.cs](./set-the-enablessl-property-on-the-smtp-client-to-enable-ssl-before-transmitting-msg-formatted-messages.cs) | set the enablessl property on the smtp client to enable ssl before transmitting msg formatted messages |
| [set-the-smtp-host-port-and-security-options-on-the-smtpclient-prior-to-transmitting-an-msg-formatted-email.cs](./set-the-smtp-host-port-and-security-options-on-the-smtpclient-prior-to-transmitting-an-msg-formatted-email.cs) | set the smtp host port and security options on the smtpclient prior to transmitting an msg formatted email |
| [set-up-an-http-proxy-for-smtpclient-proxy-to-enable-delivery-behind-corporate-firewalls.cs](./set-up-an-http-proxy-for-smtpclient-proxy-to-enable-delivery-behind-corporate-firewalls.cs) | set up an http proxy for smtpclient proxy to enable delivery behind corporate firewalls |
| [specify-a-custom-message-id-generator-that-creates-globally-unique-identifiers-for-each-sent-email.cs](./specify-a-custom-message-id-generator-that-creates-globally-unique-identifiers-for-each-sent-email.cs) | specify a custom message id generator that creates globally unique identifiers for each sent email |
| [throttle-email-sending-rate-to-no-more-than-20-messages-per-minute-to-avoid-server-limits.cs](./throttle-email-sending-rate-to-no-more-than-20-messages-per-minute-to-avoid-server-limits.cs) | throttle email sending rate to no more than 20 messages per minute to avoid server limits |
| [transmit-an-msg-email-file-through-smtp-by-configuring-smtpclient-with-sample-server-and-credential-parameters.cs](./transmit-an-msg-email-file-through-smtp-by-configuring-smtpclient-with-sample-server-and-credential-parameters.cs) | transmit an msg email file through smtp by configuring smtpclient with sample server and credential parameters |
| [use-a-custom-dns-resolver-to-locate-mx-records-for-the-recipient-domain-before-sending.cs](./use-a-custom-dns-resolver-to-locate-mx-records-for-the-recipient-domain-before-sending.cs) | use a custom dns resolver to locate mx records for the recipient domain before sending |
| [use-a-secure-socket-layer-ssl-stream-wrapper-to-encrypt-the-entire-smtp-session.cs](./use-a-secure-socket-layer-ssl-stream-wrapper-to-encrypt-the-entire-smtp-session.cs) | use a secure socket layer ssl stream wrapper to encrypt the entire smtp session |
| [use-an-http-proxy-that-requires-custom-authentication-headers-and-configure-smtpclient-proxy-accordingly.cs](./use-an-http-proxy-that-requires-custom-authentication-headers-and-configure-smtpclient-proxy-accordingly.cs) | use an http proxy that requires custom authentication headers and configure smtpclient proxy accordingly |
| [use-an-http-proxy-with-ntlm-authentication-to-send-emails-from-a-windows-domain-joined-environment.cs](./use-an-http-proxy-with-ntlm-authentication-to-send-emails-from-a-windows-domain-joined-environment.cs) | use an http proxy with ntlm authentication to send emails from a windows domain joined environment |
| [use-bindipendpoint-to-select-a-specific-network-interface-for-sending-emails-from-a-multi-homed-server.cs](./use-bindipendpoint-to-select-a-specific-network-interface-for-sending-emails-from-a-multi-homed-server.cs) | use bindipendpoint to select a specific network interface for sending emails from a multi homed server |
| [use-smtpclient-to-authenticate-to-the-smtp-server-with-basic-ntlm-or-oauth2-credentials-when-sending-an-msg-email.cs](./use-smtpclient-to-authenticate-to-the-smtp-server-with-basic-ntlm-or-oauth2-credentials-when-sending-an-msg-email.cs) | use smtpclient to authenticate to the smtp server with basic ntlm or oauth2 credentials when sending an msg email |
| [use-the-smtp-client-to-send-a-message-with-a-multipart-related-structure-containing-inline-images.cs](./use-the-smtp-client-to-send-a-message-with-a-multipart-related-structure-containing-inline-images.cs) | use the smtp client to send a message with a multipart related structure containing inline images |
| [validate-credentials-against-the-smtp-server-and-log-detailed-error-messages-for-authentication-failures.cs](./validate-credentials-against-the-smtp-server-and-log-detailed-error-messages-for-authentication-failures.cs) | validate credentials against the smtp server and log detailed error messages for authentication failures |
| [validate-recipient-email-addresses-against-rfc-5322-syntax-before-attempting-to-send-through-smtp.cs](./validate-recipient-email-addresses-against-rfc-5322-syntax-before-attempting-to-send-through-smtp.cs) | validate recipient email addresses against rfc 5322 syntax before attempting to send through smtp |
| [validate-smtp-credentials-asynchronously-to-improve-ui-responsiveness-in-a-desktop-email-client-application.cs](./validate-smtp-credentials-asynchronously-to-improve-ui-responsiveness-in-a-desktop-email-client-application.cs) | validate smtp credentials asynchronously to improve ui responsiveness in a desktop email client application |
| [validate-smtp-server-credentials-without-sending-an-email-by-calling-validatecredentials.cs](./validate-smtp-server-credentials-without-sending-an-email-by-calling-validatecredentials.cs) | validate smtp server credentials without sending an email by calling validatecredentials |

## Category Statistics
- Total examples: 167

## General Tips
- Follow root boundaries and testing guide.
- Dispose client objects; avoid hardcoded secrets; prefer explicit types.

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| Date | Run ID | Branch/Commit |
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| 2026-09-14 | `auto` | examples/batch-auto |
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