Scott D. Yelich writes:
> How does one stop this with qmail (only?) That is -- what do people
> suggest be done on my receiving side that is running qmail?
>
> Aug 16 16:34:35 ns1 tcp-env[29535]: refused connect from 208.220.39.236
> Aug 16 16:34:40 ns1 tcp-env[29537]: warning: can't verify hostname:
>gethostbyname(nehealth1.mint.net) failed
Speaking for myself, I just refuse to accept mail from these people.
My personal experience is that the likelyhood of a given IP address lacking
a functional reverse DNS is directly proportion of the likelyhood that the
same IP address is running an open relay, and that all I'll get from them
will be spam.
So, unless I succesfully resolve the IP address backwards, and I resolve it
forwards to the same IP address, I reject the mail. If I get a temporary
DNS failure, it's a temporary rejection. If I get a permanent DNS failure,
it's going to be a permanent rejection.
--
Sam
