Several of us got together a few weeks ago both physically and virtually to work on an asyncio version of smtpd.py from the standard library. We're now ready to announce our first alpha release of that work. We call it aiosmtpd: http://aiosmtpd.readthedocs.org/en/latest/
The library aims to provide a simple SMTP or LMTP server which can be used to functionally accept incoming messages for applications, but it also provides a testing framework for libraries and applications that send email. It's inspired by several similar libraries, including the stdlib smtpd.py, lazr.smtptest, aiosmtp by Benjamin Bader, and submodules in GNU Mailman. The folks at the sprint were myself, Eric Smith, Andrew Kuchling, and Jason Coombs, with R. David Murray joining us remotely. We're developing the project on GitLab and welcome all contributions!
