Haraka
5.6k
Fast, highly extensible, and event driven SMTP server.
JavaScript
OpenTrashmail
867
Complete trashmail solution that exposes an SMTP server and has a web interface to manage received emails.
PythonDocker
OpenSMTPD
576
Secure SMTP server implementation from the OpenBSD project.
C
DragonFly
259
A small MTA for home and office use.
C
chasquid
0
SMTP (email) server with a focus on simplicity, security, and ease of operation.
Go
Courier MTA
0
Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic…
C
EmailRelay
0
A small and easy to configure SMTP and POP3 server for Windows and Linux.
C++
Exim
0
Message transfer agent (MTA) developed at the University of Cambridge.
C
Postfix
0
Fast, easy to administer, and secure Sendmail replacement.
C
Sendmail
0
Message transfer agent (MTA).
C