With various threads talking, and questioning, about blacklists I have
started to try and understand these a bit more.

My own setup uses those lists given below, though these run from my firewall
mail proxy rather than from any of the mail handling applications.

>From this weeks mail log I have counted the rejects from each of the lists
(the mail traffic this week has been around 4000 mails).

22      relays.ordb.org
568     list.dsbl.org
322     sbl.spamhaus.org
0       blackhole.securitysage.com

This clearly shows that blackhole.securitysage.com is not contributing at
all and that relays.ordb.org is contributing a lot less than I had thought.

What this does not make clear is if my firewall is rejecting mail against
the first response, possible looking at the logs (though I'll fire a
question at the manufacturers to check), or if the list servers are just
very slow or not responding.

What is also not clear, to me anyway, is what would be better alternatives
as the list servers are clearly for different functions, e.g. open relays as
opposed to mail abuse. I've searched for some sort of listing of list server
type against list servers of that type but not found anything coherent.

Various posters have stated what they use and ask what others are using and
their experience of those list servers.... Is anyone collating this
information?

If so who?

If not, should we?

Regards

Alan




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