HELO controls in CommuniGate

Just read an article that outlined some patterns that were detectable
in spambot HELO/EHLO commands.

As an example, looking at my logs show dozens of IP addresses connecting
with 'EHLO ylmf-pc'.

Does anyone know of a method that allows for restricting the HELO strings in
CommuniGate? It appears that Postfix has something called 'HELO controls'. This would be an interesting feature.

I'm thinking that there isn't because I am unaware of any options providing control at that point of the SMTP
connection. The only thing I can think of is watching the logs and generating a list for blacklisting/denying IP addresses.

--

Jeff Wark
Tbaytel Internet

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