How to forward (outgoing) mail to different smtp-servers?

[urbanskater]

Ok, here's my problem: I'm trying to install a local mailserver for me and some of my friends, who all have different webmail accounts at different webmail providers with different smtp-servers. We'll use courier-imap, IMP, fetchmail and some mta (not yet decided which).

It's apparently pretty easy to collect incoming mail from different pop3-accounts via fetchmail, but is there a way to do the reverse, i.e. to sort the outgoing mailqueue by sender adress and send the mails to the appropriate smtp-server. Some kind of reverse-fetchmail.

Ok, that was confusing I guess. Here's an example:

I have 3 users: user1, user2 and user3. Each of them has a local IMAP account (where fetchmail-ed messages go) and a webmail account with different webmail providers, say user1@xmail.com, user2@ymail.com and user3@zmail.com.

Here's how outgoing mail is supposed to go:

From
user1 -> local mta -> smtp.xmail.com (U:user1, PW:foo)
user2 -> local mta -> mail.ymail.com (U:user2, PW:bar)
user1 -> local mta -> smtpserver.zmail.com (U:user3, PW:stuff)

The tricky part is that I have different smtp-servers to relay mail to (with different usernames and pwds). All mtas I've looked into had only a setting for one smtp host to send mail to, anyone knows how I can do this?

Thanks!
Urbanskater

P.S.: I know this is more complicated than it needs to be, but I'm looking for a way so that my friends won't need to get new email adresses.
_________________
Mac Mini 1,42 Ghz G4 / Mac OS X 10.4.2 (Tiger)
Powerbook G4 667 MHz / Mac OS X 10.4.2 (Tiger)
PowerMac G3 233 MHz / Mac OS X 10.2.8 (Jaguar)
PIII-450-Box / Gentoo Linux (2.6.12-r4)

[jmbsvicetto]

[kashani]

This might be what you're looking for. You will need to modify things a bit to get it to work... though I'm exactly sure that filter: is that powerful.
http://sbserv.stahl.bau.tu-bs.de/~hildeb/postfix/forward_selectively.shtml

I do however agree with jmbsvicetto that there doesn't appear to be any need to do it. The local mail server should be able to send the mails where they're supposed go regardless of the sender's address.

kashani
_________________
Will personally fix your server in exchange for motorcycle related shop tools in good shape.