>> > >
>> > > http://www.spamhaus.org/sbl/
>> > >>From my own experience above and their own description on this site, it
>> > > sounds like the SBL is fairly safe and not abusive like other DNSBL's in
>> > > the past have been accused of.  Would anyone else agree that the SBL is
>> > > generally safe to add to your MTA's rejection list?
>> > >

I ran up against this issue myself, when I finally bit the
bullet and started using the SBL for MTA level blocking. I
have not had a major problem, BUT it is important to know
that the Spamhaus list does include some major commercial
mass emailers who also run the sort of lists that some
people want to get. So I would NOT recommend it for blocking
(as opposed to tagging) in an environment serving outside
users. (I'm using it in an inhouse environment) -- and you
may have to monitor it to make sure it doesn't inadvertantly
block some legit subscription lists.

Case in point: I found it was blocking email from
internetseer.com which offers a freebie site-pinging
service, basically emailing subscribers when their web site
goes down. Well, I understand that the company does send out
UCE as well, but the fact is, I DID sign up and
I do want at least some of their email.  I simply
whitelisted them & it solved my problem.... but obviously
the problem could be repeated elsewhere.

>> > In fact the SBL is the *only* one of the blocklists that I would trust for
>> > MTA level blocking.

Actually, I've found the most effective MTA level blocking
has been open relay/open proxy blocklists. I've been using
opm.blitzed.org and dsbl.org and am very happy with results.

>> > Any open relay list is going to have collateral damage due to the simple
>> > fact that not *all* messages sent through open relays are spam... ;-)

Very true, but my rationale for blocking the open relays is
that I think the people who have them ought to know about
them and fix them. I don't use ordb.org because they go out
and actively test for relays whether or not there has been a
problem; the databases I listed above only add specified
IP's when there has been a verified report of actual abuse.

-Abigail



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