On Fri, Nov 08, 2013 at 04:22:13PM +0100, Timo Sirainen wrote: > > Ah, I had actually been mostly just thinking about inbound SMTP features. > It should of course support outbound SMTP as well, but I’m less familiar > about what functionality would be useful for that.
Outbound is mostly the same as inbound, except requirement of authentication and TLS for the "submission" (587/tcp) and ssl wrapped "smtps" port 465/tcp. Features we'd want: * authentication * per user rate limiting might be handled by Dovecot MTA instead of external program? * spam filtering trough milter? * virus filtering trough milter? * Per user Geo-blocking would be great! * Protection from password guessing ? Plus it would be great if it could check if the authentication is still valid when re-using connection, ref missing feature in postfix: http://postfix.1071664.n5.nabble.com/Solution-to-SMTPAuth-compromised-accounts-td61415.html -jf