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What MAPS do you use?

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yapadu View Drop Down
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    Posted: 27 June 2011 at 6:31am
Just wondering what people use for MAPS servers currently?  I was noticing a large number of false positives coming from SORBS, so I did some checking on the MAPS we use.


Spamcop - 1.03% false positives
Barracuda - 0.12% false positives
Sorbs - 12.15 false positives

Obviously we have pulled SORBS out of the list, that is a crazy high % of false positives.

What are you using on your servers?

Also, how does spamfilter query them?  Is the order in the list important, or are they all checked at the same time on a different thread?



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I am a user of SF, not an employee. Use any advice offered at your own risk.
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LogSat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 27 June 2011 at 5:09pm
For the technical side of the question - the MAPS servers are searched in a single thread (for each incoming email), and processed in the order in which they are listed (the MAPS, SURBL and Keywords are the only blacklists which are not automatically sorted by SpamFilter when processed).

FYI in case one wonders why we don't multithread this... We tried multithreaded in the past (you may find traces of the old settings in the SpamFilter.ini file...) but surprisingly this turned out to be less efficient, especially since once we have a "hit" we stop processing the other MAPS DNS queries, which cannot happen if all the DNS requests were executed in parallel... Think about having 1,000 concurrent connections, and making 5 or 6 MAPS queries in parallel on each... It didn't work out too well!


Edited by LogSat - 27 June 2011 at 5:10pm
Roberto Franceschetti

LogSat Software

Spam Filter ISP
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yapadu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote yapadu Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2011 at 8:09am
While researching new RBL services I found spam eating monkey.  Looks OK, but I have not tested it yet.  They publish a http://spameatingmonkey.com/lists.html

1) SEM-URI & SEM-URIRED
I suspect these should be compatible with spamfilter, but have not tried yet.

2) SEM-FRESH & SEM-FRESH10 & SEM-FRESH15
These contain domain names registered in the last 5, 10 & 15 days.  Would these lists be compatible with spamfilter?  I suspect probably not, but they would probably be a good way at stopping some additional spam with a very low false positive rate.
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Rifleman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rifleman Quote  Post ReplyReply Direct Link To This Post Posted: 25 July 2011 at 10:52am
May I get the addresses of the Barracuda MAPS ?
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