HDR From: The Post Office <postmaster>
HDR Sender:	mailer-daemon
SUB Subject: VMS style IN% -in address (error)

The following message arrived with illegal envelope data, typically a
mangled address that doesn't obey the RFC822/976 protocol specification.
Only VMS systems use  IN%"user@domain" notation to wrap up addresses
that good Internet mailers process as is.  Leave out the IN%"..." -wrapper.
Any questions ?  Postmaster can help.

Your message is being returned unprocessed.

The following annotated envelope headers illustrate the error(s):