i found the problem

the mail is being sent as From MAILER-DAEMON Thu Nov 16 18:01:47 2006 Return-path: <> you should not be doing this! that is reserved for mail delivery failures.

Well.... There are other classes of messages, such as delivery *success* notifications, for which <> is specced as appropriate; see RFC2821 4.5.5 and (eg) RFC2298 or RFC4356. Even for other mail, though, it's only a SHOULD - and there are other cases where <> is specifically called out as appropriate. For example, see RFC3464 4.2 item (d). /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse@rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B