MailBee.NET SMTP

AfterlogicEmail Tools.NET
Version v12.6.x (Mar 23, 2026)

Send and manage emails seamlessly within .NET applications.

  • Compose and send emails directly or via SMTP relay.
  • Supports bulk mailing and mail merge with database integration.
  • Ensures secure connections and advanced authentication methods.
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MailBee.NET SMTP enables .NET applications to compose, mail merge, send mail to SMTP server (including SSL/TLS like Gmail), submit to IIS queue, or directly send via DNS MX lookup.
MailBee.NET SMTP Component integrates comprehensive email sending functions into .NET applications. It enables composing, mail merging, and dispatching emails directly to recipients or through SMTP servers with backup options for reliable delivery. The component supports advanced security protocols, authentication methods, and asynchronous operations, catering to scalable and responsive development needs.

SMTP Sending Capability

Enables sending of mail messages directly to recipients or through specified SMTP relay servers, with support for backup servers to ensure message delivery even during server failures.

MailMessage Construction

Includes MIME objects such as MailMessage and Attachment for building complex emails with multiple recipients, attachments, HTML and plain-text parts, and supports international encoding and content types.

Mail Merge and Bulk Mailing

Supports sending of bulk emails with mail merge features over databases, allowing customized message delivery in scalable email campaigns or notifications.

Secure Authentication and Connections

Offers multiple authentication methods including LOGIN, PLAIN, CRAM-MD5, DIGEST-MD5, NTLM, Kerberos, OAuth 2.0, and supports secure TLS/SSL (including TLS 1.3) connections out of the box.

Advanced SMTP Features

Supports ESMTP extensions such as PIPELINING for enhanced performance, DSN for delivery status notifications, POP-before-SMTP authentication, and proxy server connections like SOCKS4/5 and HTTP.

Direct and Relay Sending Modes

Facilitates sending emails either via SMTP relay servers or directly to recipient servers by DNS MX lookup, with configurable DNS server settings and support for failover strategies.

Asynchronous and Multi-threaded Operations

Implements the modern async/await API to send emails asynchronously and supports multi-threaded sending to increase throughput up to 60 concurrent threads.

Customizable SMTP Sessions

Allows sending of custom SMTP commands, detailed logging of SMTP sessions, user-defined authentication methods, and flexible header management including Reply-To, Priority, and custom headers.

Product Compatibility

Review the details below to ensure this product is supported within your environment.

Component Type

  • .NET

.NET Version

  • .NET 8 LTS
  • .NET 6 LTS
  • .NET 5 / .NET Core 3.1
  • .NET 4.8 or earlier

.NET Platform

  • .NET Assembly
  • .NET Class
  • .NET Core 3.1 Assembly

IDE Support

  • Visual Studio