> You have to use a fallback relay setting that sends the mail to a second > Postfix instance on your machine, and have that instance send all mail > to the relay, with sender-dependent authentication. This would be a full > Postfix instance, not just another master.cf entry:
Thanks, Victor. A followup question, if I may. Briefly, can you help me understand what is going on in a situation like mine that will require the use of a second, completely separate Postfix instance (and precludes doing what I want to do in a separate master.cf entry)? Rich Wales ri...@richw.org