Jake Vickers wrote:
> jason p wrote:
>> I removed sbl-xbl.spamhaus.org a few weeks ago when their legal troubles
>> started; it was causing me SMTP timeout problems back then. I tried
>> putting
>> it back once about a week ago, and as soon as I did my SMTP connections
>> started taking forever. I also removed the others because they either
>> didn't respond to pings (not a big deal, many servers don't) or they
>> didn't
>> resolve to an IP address (I don't think that is good). I would try
>> sticking
>> just the servers that you know are good in there first, then add the
>> others
>> one at a time.
>>
> Very few BL's will be ping-able, or resolve. They're essentially DNS
> servers. Your machine makes a query to them (using this email as an
> example) asking who qmailtoaster.com is. If the BL server returns
> "127.0.0.1" (this result can change from BL to BL) then your machine
> knows it's good. If it returns "127.0.0.2" then it knows it's bad and
> can bounce it.
>
EE wrote a nice explanation on the list too a little while back. Check the
archives.
--
-Eric 'shubes'
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