I'm having some difficulty figuring out how to configure both recipient and sender dependent relay hosts.
1. Some of my users need to send mail through specific relay hosts with login:password; 2. Other users on the same box will use the local SMTP server to relay mail: the default transport if you will, without password; 3. Finally, some outgoing mail has to be routed through other relay hosts according to the recipient domain without consideration of the sender. Those relays have login:password. Option 1 can be configured by using the sender_dependent_relayhost_maps option and both a sender_relay and a sasl_passwd file. Option 2 is selected by Postfix if the specified sender is not found in the sender_relay file mentioned above. Option 3 is made possible by using a transport_map file where the specific recipient domain is listed, with a proper [some-relay.tld]:587 affixed. But where do I put the login:password of [some-relay.tld]:587? If I put it in the sasl_passwd file, ALL mail not specified in the sender_relay file is routed through [some-relay.tld]:587, and not the local SMTP relay. Is there any configuration that could make 1, 2 and 3 possible concurrently? Thanks for your help. ---------------------------------------- François
