On Fri, Jul 13, 2007 at 08:59:18 +0200, Andreas Bernauer <fedora@xxxxxxxxx> wrote: > Matthew Benjamin wrote on Thu, Jul 12 2007 at 22:19 (-0500): > > I believe sendmail > > David meant your user agent (mutt, thunderbird, ...) , not your > delivery agent (sendmail, postfix, ...). Maybe he types messages into sendmail. I have done that occasionally for testing or when I have a pregenerated message that already has the headers I want in it. He should also tell us whether he wants a one time change or to change the default as the way you do those is typically going to be different.