S

smtp

🔧🔗https://github.com/etkecc/postmoogle Postmoogle is Matrix <-> Email bridge in a form of an SMTP server

Smailnail

🔧🔗https://github.com/go-go-golems/smailnail Interact with IMAP servers

🔧🔗https://github.com/stalwartlabs/mail-server

Secure & Modern All-in-One Mail Server (IMAP, JMAP, POP3, SMTP)