On Fri, 2 Mar 2007 17:10:04 -0800
[snip story of "my customer is an idiot with their
mailserver and
their virus farm NATted to the same IP address"]
In the real world, ISPs typically provide single IP
addresses and a NAT router to small offices. They tend to
charge exorbitant amounts for separate IP addresses (and
logically enough, in their desire to avoid wasting the
limited IPv4 address space).
[snip]
A solution for coping with the immediate problem would
be to relay outbound email through a trusted (better
managed) provider.
That is what ultimately I did for them, at least as a
stopgap measure. The problem is that if they got infected
once, they will inevitably get infected again.
There are also several websites that will assist you in
identifying the black-hole lists. If being black-hole
listed is the only damage from an infected system,
consider yourself lucky.
A black-hole search is available at:
http://www.moensted.dk/spam/
Thanks for the tip. Indeed, that looks like a very useful
site.
Gordon Peterson
http://personal.terabites.com
1977-2007 Thirty year anniversary of local area
networking
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