Our primary communication interface is - you guessed it - mailing lists!
We have a number of mailing lists for various purposes:
We currently use GitHub Issues for tracking bugs and improvements: https://github.com/apache/incubator-ponymail/issues
We are also on IRC, if you fancy a quick chat. You can find us in #PonyMail on irc.libera.chat.
Security issues and inquiries should be sent to: security@apache.org