Wietse, OK, thanks. That explains everything. I'm using NMH and was able to fix the problem by editing localname in mts.conf.
Our previous system (on the machine that died) used sendmail, which I'm guessing had the ability to fix the "From:" header the way I needed it, but I haven't looked into it closely and don't care enough to. Thanks, -- Adam -----Original Message----- From: Wietse Venema <wie...@porcupine.org> To: Postfix users <postfix-users@postfix.org> Sent: Mon, Jan 3, 2011 11:31 am Subject: Re: Changing address in "From:" header adambenesc...@aol.com: Hi, I'm trying to set up Postfix on one of our hosts to handle (among other hings) outgoing mail. We have several hosts in our domain (which I'll call omain.com). The problem I'm trying to solve is that when I send a message, either to nother user in our domain or to an outside address, the From: header of the essage appears as From: Adam Beneschan < a...@host1 > (no spaces inside the angle brackets, I've added them to foil AOL), but I need t to appear as From: Adam Beneschan < a...@domain.com > You need to fix the mail sending application. Postfix does not use ain.cf:myorigin when the address already has a domain. Wietse