ClamSMTP with TLS (STARTTLS) client side support when accepting direct (port 25) connexions.
Originally from http://thewalter.net/stef/software/clamsmtp/ by Stefan Walter. A git repository was actually here http://thewalter.net/git/cgit.cgi/clamsmtp/ but didn't include the /common/ directory.
Two options have been added to the clamsmtp.conf file:
TLSKey: /path/to/file.key TLSCert: /path/to/file.crt
Feel free to contact me for any questions or bugs.