Courier IMAP timeout when sending.

I hope this is the correct forum for this - if not my apologies.

I'm using Courier as my mail server, and trying to setup some mailboxes. I can received email on all of them (SSL) no problem, but I can't send anything from any account. I've tried SSL/No SSL, on port 25. I can resolve the mail server, but I get "an operation on the server timed out" - Error code 3259 (SMTP server timed out). I've tried both POP and IMAP, and both server types can receive mail, but not send.

I don't see anything in /var/log/maillog that looks like an error, but honestly I'm not sure what I should be looking for. I've rebuilt courier, and even tried switching to Dovecot but no dice.

Any insight would really be appreciated. Thanks!

 

I actually sorted this out - thanks for the reply all the same!

I had "EXIM on another port" configured in CSF, set to 26. Hopefully this helps someone else out that may find this thread in a search. Cheers!