Rodney Green wrote:
You have to remember that there's at least 3 places where that address can apply, and they're all independent systems: POP3 or IMAP authentication (POP3/IMAP server), return or sender address (mail client), and inbound routing (SMTP server, like exim).Example: webmaster@domain.com If the accounts are dependent on a system user account there can only be one webmaster account. Of course, an alias can be setup that points webmaster@seconddomain.com to a different local system user like webmaster2. With some e-mail systems I've seen (Windows based) the full e-mail address is used as the account name instead of a system user account. So, in the client the pop3 user would be setup as webmaster@domain.com instead of just webmaster. Get what I'm saying? :-)
I say that because I detect a little confusion on that point in your posting. Or maybe you're just being brief. :-)
That said, sticking point is probably non-Unix POP3/IMAP authentication, and Cyrus can apparently do this using Kerberos, and Courier can do it with a variety of mechanisms.
I'd look at Courier, if it were I. :-)