On 2016-08-10 12:00 PM, Erik Andersen wrote:
Hi
Agree, but then your mailserver has do deal with it, refusing it as
part of the tcp connection will move load away from your mail server.
Rgds
There's no way to know at the initial TCP connection what the host will
send in the HELO command. That would be a few packets in. But, as I
said, once you have detected them you could have a script that adds the
IP to a table, and block with iptables based on that...
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