Full-featured, open source mail server solution for mainstream Linux/BSD distributions.
iRedMail is a full-featured mail server solution: https://www.iredmail.org/
Don't forget to check out our lightweight email archiving software: https://spiderd.io/
It supports few mainstream Linux/BSD distributions:
More info:
We recommend to deploy iRedMail server with the iRedMail Easy platform, it offers easy deployment, one-click upgrade, and tech support via the ticket system. Check our website for more details.
There's also an all-in-one Docker edition here: iredmail/dockerized.