[Mimedefang] Rejecting e-mails with blank CC: and Reply-To:

Michal.Jankowski at fuw.edu.pl Michal.Jankowski at fuw.edu.pl
Fri Apr 13 17:31:57 EDT 2012

> Hello,
> We receive messages from a system that sends e-mails with a blank
> Reply-To: and CC: lines, and (I think) mimedefang is rejecting them.
> This is what I see logged on my system:
> Apr 10 08:04:57 mx sendmail[1400]: q3AF4uDC001400: collect: premature EOM:
> unexpected close

> And this is what our upstream mail handler gets:
> (hostXXXX.thermeon.com[] said: 554 5.7.1 This message has been
> blocked because the return email domain is invalid.(domain name   has
> invalid syntax) (in reply to end of DATA command))

This looks like a cisco router/firewall/asa/whatever intercepting
smtp traffic and doing own 'fixups'. Switch it off.




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