HDR From: The Post Office <postmaster>
HDR Sender:	mailer-daemon
SUB Subject: Invalid message header

A copy of your message is being returned to you because it arrived with
an illegal header according to the RFC822/976 protocol specification.
If you do not recognize the source of the bad header, perhaps you should
ask a Postmaster at your site.

The following annotated headers illustrate where the error(s) occurred: