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.
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