MailBee.NET Queue Releases

Released: Dec 8, 2023

Updates in v1.6.5


  • MailBee.NET.dll has been updated to v12.4.


  • Fixed an issue when some EMLs were left unsent in the pickup folder (occured extremely rarely when Windows file enumerating API missed some files in the folder).

Released: Oct 19, 2021

Updates in v1.6.4


  • MailBee.NET.dll has been updated to v12.3.
  • Improved documentation (highlights how to use TLS 1.2 or recompile the app to support TLS 1.3 on Microsoft .NET Framework 4.5+).

Released: Oct 29, 2019

Updates in v1.6.3


  • MailBee.NET.dll updated to v12.1. This includes a fix with resolving large (512+ bytes) DNS MX records which can be important in direct send mode.
  • Documentation improvements (highlights how to overcome "The service could not be started. Cannot start service MailBee.NET Queue on computer '.'. The service did not respond to the start or control request in a timely fashion." error).

Released: Jul 23, 2019

Updates in v1.6.2


  • MailBee.NET Queue now attempts to use TLS 1.2 as SSL protocol (when available) and falls back to TLS 1.0 only if TLS 1.2 and TLS 1.1 is not supported by the SMTP server.


  • MailBee.NET.dll update to v12.0 (fixes misc. issues), requires version 12 license key.

Released: Oct 24, 2017

Updates in v1.6.1

Updates in v1.6.1

  • MailBee.NET Queue sources (shipped with the product) now contains code showing how to prevent MailBee from automatically adding Message-ID to the messages being sent out.
  • MailBee.NET.dll update to v11.2. This provides: SIZE argument of MAIL FROM command, short path of SMTP authentication (required by Microsoft SMTP servers), no extra CRLF in the end of DATA transmission in SMTP.

Released: Mar 14, 2017

Updates in v1.6


  • It no longer automatically adds plain-text version of HTML body to HTML-only messages.
  • Mail engine is now MailBee.NET Objects v11.
  • SHA256 signatures and strong names (in addition to SHA1) for .NET Queue .DLL and .EXE files.

Released: Nov 27, 2013

Updates in this release

Updates in 8

  • Email Address Validator Component - Check email addresses for syntax and validity.
  • Support for mail merge over System.Data.IDataReader.
  • Support for OAuth v2.0 including Gmail's XOAUTH2 extension.
  • Improved IPv6 compatibility.
  • Improved support for Outlook .MSG and .PST conversions.
  • Improved MIME parser and builder, including support for international characters and quoted strings in headers.

Released: Jan 15, 2013

Updates in this release

Updates in 7.3

  • Windows 8 compatible installer.
  • New options for checking SSL certificates
  • .NET Framework 4.0/4.5 compatibility enhancements.
  • MIME parser fixes.

Released: Nov 8, 2011

Updates in this release

Updates in 7.0.1

  • New PDF Converter component allows HTML to PDF conversion.
  • MailBee.NET.dll is now natively compiled for .NET 4.0 (.NET 1.1 and .NET Compact deprecated, .NET 2.0/3.5 is still fully supported).
  • New Certificate.SubjectAlternativeName property.
  • Includes numerous improvements and fixes to Outlook .MSG and .PST conversion, MIME parser and builder.

Released: Jul 21, 2011

Updates in this release

Updates in 6.10.1

  • AuthenticationOptions.UseLocalDomainAsDefault flag to fine-tune MS Exchange authentication via NTLM and GSSAPI, and other improvements to NTLM/GSSAPI authentication.
  • Numerous improvements and fixes to S/MIME functionality.
  • Revised ASP.NET samples.
  • Documentation improvements (Developer's Guide re-structured, added "Deployment and Redistribution" topic, and other fixes).