Issues

• Vulnerability Report: Repeated PROXY Command Causes Session Fault

  cosullivan/SmtpServer#273 · Filter by author Ch1ps-dot opened on Jun 1, 2026

• Vulnerability Report: AUTH Invalid Base64 Causes Session Fault

  cosullivan/SmtpServer#272 · Filter by author Ch1ps-dot opened on Jun 1, 2026

• EndpointDefinitionBuilder - Only IPv4

  cosullivan/SmtpServer#271 · Filter by author tinohager opened on May 19, 2026

• How to close connection in OnCommandExecuting event?

  cosullivan/SmtpServer#269 · Filter by author alexey-us opened on Feb 27, 2026

• Windows NTLM / Kerberos auth support?

  cosullivan/SmtpServer#264 · Filter by author jlrouzies-mantu opened on Oct 14, 2025

• Nuget Version 11.0.0 vs GitHub 8.0

  cosullivan/SmtpServer#251 · Filter by author ruicaramalho opened on May 21, 2025
  4

• Add support for .net standard 2.0

  cosullivan/SmtpServer#250 · Filter by author Sicos1977 opened on May 14, 2025
  10

• NativeAOT Compatibility

  cosullivan/SmtpServer#248 · Filter by author HolyOne opened on Mar 11, 2025
  2

• Accessing SSL Stream

  cosullivan/SmtpServer#246 · Filter by author ismailadebayo89 opened on Mar 10, 2025
  1

• ServiceCollection feedback

  cosullivan/SmtpServer#242 · Filter by author MmMapIoSpace opened on Nov 8, 2024
  1

• Missing angle brackets (<>) in MAIL FROM command

  cosullivan/SmtpServer#219 · Filter by author oleg-km opened on Jun 25, 2024
  1

• Certain errors that bubble up from MailerMessageStore.SaveAsync are swallowed

  cosullivan/SmtpServer#218 · Filter by author lachlann562 opened on Apr 26, 2024

• Bcc lost ?

  cosullivan/SmtpServer#217 · Filter by author dvandevate opened on Apr 24, 2024
  1

• Using SmtpServer as a SMTP Filter for SPAM

  cosullivan/SmtpServer#216 · Filter by author alijundi opened on Apr 16, 2024
  1

• SessionCreated - Block IP & Return SMTP Response

  cosullivan/SmtpServer#215 · Filter by author idblew opened on Jan 26, 2024

• Nuget does not match Github

  cosullivan/SmtpServer#212 · Filter by author mgaffigan opened on Dec 14, 2023
  9

• Cannot get TLS to work

  cosullivan/SmtpServer#211 · Filter by author salusalpha opened on Dec 5, 2023
  1

• RobiniaDocs API Explorer

  cosullivan/SmtpServer#208 · Filter by author NeuroXiq opened on Sep 16, 2023
  2

• SCRAM-SHA-1(-PLUS) + SCRAM-SHA-256(-PLUS) + SCRAM-SHA-512(-PLUS) + SCRAM-SHA3-512(-PLUS) supports

  cosullivan/SmtpServer#206 · Filter by author Neustradamus opened on Aug 6, 2023

• Support for BDAT

  cosullivan/SmtpServer#194 · Filter by author The-Tree opened on Apr 4, 2023

• Add option to hide SmtpServer version

  cosullivan/SmtpServer#187 · Filter by author bogdanst24 opened on Jan 23, 2023
  5

• Doesn't work with native smtp client

  cosullivan/SmtpServer#178 · Filter by author erhan355 opened on Aug 18, 2022

• System.IO.IOException: Authentication failed because the remote party has closed the transport stream

  cosullivan/SmtpServer#174 · Filter by author PinnacleCoders opened on Feb 27, 2022

• Pipereader example require internal "unsafe" class

  cosullivan/SmtpServer#169 · Filter by author large opened on Jul 23, 2021
  1

• Email TO/FROM without angle brackets to support older SMTP clients

  cosullivan/SmtpServer#166 · Filter by author 1Jesper1 opened on Jul 6, 2021
  1