On Mon, 1 Nov 2004, David F. Skoll wrote:
That's true. But a very narrow block can block a lot of spam. My mail
server (mail.roaringpenguin.com) has IP address 206.191.13.82.
<..>
The maillog covers about 36 hours. That means that more than once an hour,
some random host claims to be *my* IP address (206.191.13.82) in its HELO.
I block all of those and haven't had a complaint yet.
As do I. Blocking HELO claiming to be my domain works well also.
(If you were pedantic, you'd block a host that uses any kind of naked
IP address in HELO, because it really should use [ip.addr.of.host]
with the square brackets.)
I tried that but rejected good email from a few broken mail servers. :-(
Regards,
Mike Lambert
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