Also take a look at Stalwart: https://github.com/stalwartlabs/mail-server https://github.com/stalwartlabs/mail-server I haven't used it, but have used some of

Also take a look at Stalwart: https://github.com/stalwartlabs/mail-server https://github.com/stalwartlabs/mail-server I haven't used it, but have used some of the sub-crates for some email-parsing problems, and it worked great.