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Re: [Snort-sigs] Could you send me on a signature to capture all emails that are sent to a domain, for example “ () tnt com”
From: Balasubramaniam Natarajan <bala150985 () gmail com>
Date: Sun, 20 Jan 2013 00:07:28 +0530

On Sat, Jan 19, 2013 at 1:30 AM, Aisling Brennan <aislingbrennan21 () gmail com

Two points

1. Please don't convey the entire message using the Subject :-O

2.  Try this signature

alert tcp $HOME_NET any -> $EXTERNAL_NET 25 (msg:"Mail sent to at tnt dot
com domain"; flow:to_server,established; content:"rcpt to|3a|"; nocase;
content:"|40|tnt|2e|com"; within:800; sid:10000000; rev:1;)

Balasubramaniam Natarajan
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