JT Moree wrote: > > I dont see very many that do this on the wiki. I understand that the > wiki is new and some plugins will not be up there. > > I see an rcpt_ldap plugin which does what I'm asking but we are not yet > using ldap. It could be used as a model for another one I guess . . .
A few weeks ago someone pointed out that if your "real" mailserver does do rcpt checking. (In my case I have postfix behind qpsmtpd) you can use the queue-smtp plugin to pass mail off to the backend server. queue-smtp will error if the backend server doesn't like the rcpt. The disadvantage of this system is that the queue-smtp plugin does not connect to the backend server until after the DATA transaction. Someone clever could probably modify the queue-smtp plugin with a rcpt_hook that connects to the backend server and issues the rcpt lines to the backend server in lockstep with qpsmtpd, avoiding the data portion if the backend server doesn't like the recipients.
Mark
