[Exim] Relaying by SenderUser...

I Currently Have been using qmail with qpsmtpd.

I am looking @ setting up exim to use as a mail relay. Relay outgoing
mail only. No local users!

Basicly just a box that exepts outgoing mail from any address from any
list (user@domain) to hold temperarly & proxy to a couple of croncher box's.

Though IP tables this box will reroute all outgoing mail though other
mail servers that will check it for virus/spam issues.

Any help / sejestions would be wonderful.

tmb