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Change Log

v11.1.0

  • Added: Configuration option to define the maximum allowed message size.
  • Added: Support for custom SMTP greeting messages.
  • Improved: Optimized protection against excessively long text segments to enhance stability and performance.
var options = new SmtpServerOptionsBuilder()
	.ServerName("My mail server")
	.MaxMessageSize(5242880, MaxMessageSizeHandling.Strict) //5MB
	.CommandWaitTimeout(TimeSpan.FromSeconds(60))

v11.0.0

  • Added: SslProtocol support to SecurableDuplexPipe.
  • Added: GitHub workflow for automated build and unit tests.
  • Added: Summary information to classes for improved code documentation.
  • Added: Session timeout to automatically close connections that remain open for too long.
  • Fixed: Missing SessionCreated event in failure scenarios.

v10.0.1

  • Fixed a bug that could cause a failure to recognize commands when using a large number of recipients.

v10.0.0

  • Removed MailboxFilterResult in favor of bool result. Impementations can throw SmtpResponseException for more control.
  • Handled servers that send the QUIT command and immediately close the connection.
  • Added an ICertificateFactory on the Endpoint that allows a new certificate to be created when required without having to restart the server.

v9.1.0

  • Added a ResponseException event handler to the ISessionContext to enable external logging of exceptions.

v9.0.3

  • Fixed a bug with the session not closing when the cancellation token was cancelled.

v9.0.2

  • Fixed a performance issue whereby the server would block incoming connections whilst another connection was upgrading to SSL.

v9.0.0

  • Breaking API change by removing the Certificate from the server options and adding it to the endpoint.

v8

  • Version 8 contains substantial refactoring to take advantage of System.IO.Pipelines in an effort to improve throughput performance and reduce memory allocations.
  • In addition to this there are also changes to make service resolution easier via Dependency Injection through utilizing the IServiceProvider interface.