random thoughts and discussions on the things that interest me

#500 Firewall Error ##

Occasionally I have received the following error when trying to send emails to other organisation from Exchange 2007:

Diagnostic information for administrators:
Generating server: #500 Firewall Error ##

It turns out that this is actually due to the Cisco router inspecting SMTP traffic. Entering the command below into IOS fixed the issue:

no ip inspect name SDM_LOW esmtp

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