Port 25 tcp open to allow incoming and outgoing mail.
Port 443 tcp open for SSL HTTP access (if you have set up ssl)
Port 80 tcp open for HTTP access.
Port 22 tcp for remote SSH access if you need to administer it remotely.
The IMAP access of sqwebmail happens on the toaster itself. There is no need to open those ports to the public.
Correct me if I'm wrong.
Sqwebmail is a cgi that talks to Maildirs directly. There is no imap in-between.
Bill
