Chris's Wiki :: blog/spam/DiminishingDNSBLTheories Commentshttps://utcc.utoronto.ca/~cks/space/blog/spam/DiminishingDNSBLTheories?atomcommentsDWiki2013-04-29T16:44:12ZRecent comments in Chris's Wiki :: blog/spam/DiminishingDNSBLTheories.From 98.150.145.94 on /blog/spam/DiminishingDNSBLTheoriestag:CSpace:blog/spam/DiminishingDNSBLTheories:dad66a20e17310d255e9bc3999c7918f31555465From 98.150.145.94<div class="wikitext"><p>b.barracudacentral.org and zen.spamhaus.org are the two we use. I honestly couldn't tell you the split between the two. Producing such metrics has been on my to-do list for a while, it's just not that big a priority!</p>
</div>2013-04-29T16:44:12ZBy Chris Siebenmann on /blog/spam/DiminishingDNSBLTheoriestag:CSpace:blog/spam/DiminishingDNSBLTheories:fd3d428b4ada0f0e66b65b12cde05f7fe6f623f1Chris Siebenmann<div class="wikitext"><p>I agree that Spamhaus remains valuable (and we use it here). What I'm
mostly wondering about is the apparent lack of similar DNSBLs the way
there used to be in the past. If you can share the information, I'd be
interested to know what additional DNSBLs you use and perhaps how the
breakdown of block rates goes for them.</p>
<p>(Right now I can't see anything we'd really want to use in addition to
Spamhaus, but I may be out of touch with that whole area and so missing
good DNSBLs.)</p>
</div>2013-04-29T15:51:20ZFrom 98.150.145.94 on /blog/spam/DiminishingDNSBLTheoriestag:CSpace:blog/spam/DiminishingDNSBLTheories:bb194aa8bd93e31ef73d7f0bacc5152f68f4d679From 98.150.145.94<div class="wikitext"><p>I still like and use DNSBLs, primarily Spamhaus, for our infrastructure.
I've got the usual back-end opensource anti-spam options running, but the simple matter is they take processing power. DNSBLs take very negligible power. The DNSBLs I use block somewhere in the region of 80% of our incoming connections, which is really quite significant!
If I wasn't relying on them and just relying on the heuristic programs to do their thing I'd certainly have to be getting more powerful infrastructure to handle our emails. As good as those opensource solutions are, we see a marked increase in spam that doesn't get filtered if we drop the DNSBLs.</p>
</div>2013-04-27T22:22:39Z