Without using Postfix, Sendmail, Qmail or Exim, is it possible, in pure Python, to have a server that receives emails, and based on certain conditions (such as the subject), redirects them or not to another email server, i.e. a gmail address?

Does Python have receiving-only email capability built-in, without third party module, in a similar way that it has http.server built-in?

CodePudding user response：

Yes, that is smtpd — SMTP Server. However, the smtpdmodule is deprecated since Python version 3.6. The recommended replacement is aiosmtpd, which is not in the standard library, alas not build in.