[Mimedefang] Rejecting e-mails with blank CC: and Reply-To:
Steffen Kaiser
skmimedefang at smail.inf.fh-bonn-rhein-sieg.de
Fri Apr 20 03:24:11 EDT 2012
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On Fri, 13 Apr 2012, Michal.Jankowski at fuw.edu.pl wrote:
> This looks like a cisco router/firewall/asa/whatever intercepting
> smtp traffic and doing own 'fixups'. Switch it off.
>
> http://blogs.oucs.ox.ac.uk/networks/2009/11/26/cisco-firewall-smtp-fixup-considered-harmful/
>
> http://www.binarywar.com/2009/11/cisco-pixasa-causes-smtp-banner-corruption/
Most irritating was a Cisco between our mail server and the internet that
removed STARTTLS from our server's SMTP greeting ... .
Back to the OP: If a Cisco terminates the connection, the receiving
sendmail would log EOM and the transmitting server would get the SMTP code
from Cisco. Insofar, it could fit.
Regards,
- --
Steffen Kaiser
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