This is interesting: in testing this on the server in question, the "-f" does nothing (with a lowercase -f).
In an older sendmail man page I just came across it says "... -f can only be used by trusted users (normally root, daemon, and network) or if the person you are trying to become is the same as the person you are." So I guess my php code doesn't get permission to use it. (The current man page doesn't have that ...) "-r" sets the Return-Path and the From if there is no From in the $headers set in the php code, otherwise the -r sets only the Return-Path. So what works for my setup is: $headers = 'Reply-To: ri <[email protected] >' . PHP_EOL . 'From: ri <[email protected] >' ; $subject ="some subject"; $message = 'some text'; $to = "some one <[email protected]>"; $done = mail($to, $subject, $message, $headers, '-r [email protected]'); The message then arrives with the different addresses as expected: Return-Path: <[email protected]> To: some one <[email protected]> Subject: some subject Reply-To: ri <[email protected]> From: ri <[email protected]> And it does go via Postfix, from the Log: Dec 12 18:24:34 machine-domain postfix/qmgr[2578]: CF99E10119: from=<[email protected]>, size=427, nrcpt=1 (queue active) Dec 12 18:24:36 machine-domain postfix/smtp[12071]: CF99E10119: to=<[email protected]>, ... On 12 déc. 2010, at 18:20, Wietse Venema wrote: > R.A. Imhoff: >> In fact what finally does set the Return-path is to use the "-r" parameter >> in the 5th place: >> >> $result = mail($to, $subject, $message, $headers, "-r [email protected]") >> >> the "-f" sets the "From:", but that was already working by setting it in the >> $headers or in the php.ini > > No, that is incorrect. > > With POSTFIX, the -f and -r options do exactly the same thing: > > case 'f': > sender = optarg; > break; > ... > case 'r': /* obsoleted by -f */ > sender = optarg; > break; > > If you look in your logging, you may find that you are handing the > mail to something other than POSTFIX. > > POSTFIX submissions looks like: > > pickup[xx]: yyy: uid=1001 from=<wietse> > cleanup[zz] yyy: message-id=<[email protected]> > > Wietse
