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

[Steffen Kaiser]

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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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