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ANNOUNCE: Adding new JP list to multi.surbl.org
by Jeff Chan 28 Sep '04

28 Sep '04

[Please post follow ups to the SURBL discuss list or to me.] One of the distinct data sources currently feeding into ws.surbl.org includes data from Joe Wein and Raymond Dijkxhoorn with his colleagues at Prolocation. Raymond and Prolocation are currently processing more than 300,000 potential spams per day using Joe's jwSpamSpy server software and combining those with Joe's own results. In addition to the data processing software, Joe has an elaborate, thorough, and well-thought-out set of inclusion criteria which includes age of domain registration, manual checks, and other factors. The resulting data are an extensive list of spam URI domains with a very low false positive rate (hits on legitimate messages). We are calling this resulting data JP for Joe Wein + Prolocation. The bottom line is that JP (called PJ in the table below) has a significantly lower false positive rate than WS while having similar spam detection rates, for example as measured against a large corpora set belonging to Theo Van Dinter of SpamAssassin: OVERALL% SPAM% HAM% S/O RANK SCORE NAME 2424443 2357143 67300 0.972 0.00 0.00 (all messages) 100.000 97.2241 2.7759 0.972 0.00 0.00 (all messages as %) 7.595 7.8122 0.0045 0.999 1.00 0.00 URIBL_SC_SURBL 76.754 78.9448 0.0178 1.000 0.80 0.00 URIBL_OB_SURBL 77.230 79.4340 0.0208 1.000 0.60 1.00 URIBL_PJ_SURBL 0.985 1.0126 0.0045 0.996 0.50 0.00 URIBL_AB_SURBL 82.119 84.4600 0.1367 0.998 0.40 0.00 URIBL_WS_SURBL 0.021 0.0216 0.0045 0.829 0.00 0.00 URIBL_PH_SURBL So we feel the data could usefully be broken out into a separate list which could safely be scored higher than WS. We also continue to work on improving the False Positive rate of WS of course. We propose making JP a separate list within multi.surbl.org, but *not* a standalone list like jp.surbl.org, since it's a major effort to set up entirely new lists and most people should be using multi now. The main reason for announcing this change ahead of time is to allow developers of the many programs (in addition to SpamAssassin) now using SURBL data to update their code or configurations to take into account that the result codes in multi will be changing as a result of adding JP. JP would get the 64 bitmask, as in: 2 = comes from sc.surbl.org 4 = comes from ws.surbl.org 8 = comes from phishing list (labelled as [ph] in multi) 16 = comes from ob.surbl.org 32 = comes from ab.surbl.org 64 = comes from jp list So a record in SC, WS, and JP would give a value 127.0.0.70. One with WS, OB, and JP would resolve to 127.0.0.84, etc. Programs using multi.surbl.org should be updated accordingly. Since JP is currently included in WS, there will be 100% overlap of JP entries in WS so that any record in JP will also be in WS. In other words about half of the WS records in multi will increase by 64 due to overlap with JP. But WS will continue to use the 4 bit, as before. If your programs are decoding the multi results using the bit positions, they should need no adjustments to continue to handle the WS data. We hope that 5 days is not too short notice for this kind of change.... I will try to contact the developers of the various (non-SA) programs separately to make sure they're aware of the coming change. Hopefully most of them are on this announcement list however. We were not able to get JP as a separate list in yesterday's SpamAssassin 3.0.0 full release, but we have gotten it into SA 3.1 development. For now the JP data will continue to be included in WS, but just before Spam Assassin 3.1 gets released (probably in 6 months to a year from now), we will remove JP data from WS to make them separate lists within multi. This means that SpamAssassin 3.0 and other current users of WS will continue to to get the benefits of JP under their default shipping configurations, and that JP can also be used separately by those who modify their configurations to take advantage of it. In summary, we will: 1. Add JP to multi.surbl.org on Monday September 27th. (Note that like PH, JP would not be available as a separate list, only as part of multi.) 2. Keep the JP data in WS for now, so that regular 3.0 users get the advantages of JP also (as part of WS). 3. Ask the SpamAssassin developers to score JP separately in SA 3.1. 4. Remove JP from WS before the final SA 3.1 mass check and re-scoring is done, to make the two lists more separate for 3.1 . (Note that the separation is removal of the specific subset arrangement suggested in #2. If that is done, there will still be some minor overlap of the records in WS and JP.) 5. Inform people about removing JP from WS before we do it, so existing WS users can add JP, etc. Please post follow up questions or comments to the SURBL discuss list or to me personally. Thanks, Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: ccTLDs in two-level-tlds file updated somewhat
by Jeff Chan 27 Sep '04

27 Sep '04

On Saturday, September 18, 2004, 11:58:56 PM, Frank Ellermann wrote: > [Konqueror list] >>> | name,ai,au,bd,bh,ck,eg,et,fk,il,in,kh,kr,mk,mt,na, >>> | np,nz,pg,pk,qa,sa,sb,sg,sv,ua,ug,uk,uy,vn,za,zw I have updated the ccTLDs for the ones Frank mentioned, removed some duplicates, and added some data for a few other ccTLDs. The results are in: http://spamcheck.freeapp.net/two-level-tlds Really this is just for completeness since geographic domains other than .us aren't used in spams too often. Jeff C. -- "If it appears in hams, then don't list it."

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Suri checks mail in text files against SURBLs
by Jeff Chan 26 Sep '04

26 Sep '04

Yves Junqueira's Suri does SURBL checks on mail stored in files. Adapted from Devin Carraway's plugin to qpsmtp, Suri is a general-purpose program usable with amavisd and others. http://i-admin.blogspot.com/2004/09/suri-spamvertised-uris-filter-using.html Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: SpamAssassin 3.0.0 released, includes SURBL support
by Jeff Chan 22 Sep '04

22 Sep '04

Released today, SpamAssassin 3.0.0 has support for SURBLs built-in and enabled by default. It checks multi.surbl.org using the command urirhssub in the URIDNSBL plugin. http://spamassassin.apache.org/full/3.0.x/dist/doc/Mail_SpamAssassin_Plugin… If you administer a high volume mail server processing 100k messages per day or more, please set up a local DNS mirror for your own use of the SURBL zone files using rsync and rbldnsd as described in some of the links on our rsync signup form: http://www.surbl.org/rsync-signup.html If you are able to host public DNS for the SURBL zones, please let us know. Pre-release traffic was about 70-80k bits per second, and we expect that to go up at least 5-fold, but that's just an estimate. Cheers, Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANOUNCE: Welcoming new public name servers
by Jeff Chan 18 Sep '04

18 Sep '04

We'd like to welcome and thank the addition of two new public SURBL name servers j3 and k3.surbl.org administered by: Arjen Wolfs of Wanadoo Nederland BV Without all of our public nameservers and the help of their administrators, SURBLs would not be possible. Our thanks to all of them! Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANOUNCE: Welcoming new public name server
by Jeff Chan 18 Sep '04

18 Sep '04

We'd like to welcome and thank the addition of a new public SURBL name server d3.surbl.org administered by: Kevin A. McGrail of Peregrine Computer Consultants Corporation Without all of our public nameservers and the help of their administrators, SURBLs would not be possible. Our thanks to all of them! Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: SURBL TTLs optimized at 15 minutes
by Jeff Chan 17 Sep '04

17 Sep '04

After trying DNS TTLs at 1 hour, 25, 20, 15 and 10 minutes, it appears that 15 minute TTLs optimizes both name server traffic and the quickness of records being added or deleted from the lists. Therefore, we are standardizing on 15 minute TTLs for all SURBLs. Note that this result applies to SURBL data and uses of it. It may or may not apply to other types of RBLs. Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANOUNCE: Welcoming new public name server, misc name server news
by Jeff Chan 17 Sep '04

17 Sep '04

We'd like to welcome and thank the addition of a new public SURBL name server administered by: Chris Stone of AxisInternet, Inc. Without all of our public nameservers and the help of their administrators, SURBLs would not be possible. Our thanks to all of them! Some additional name server news: all of the name servers which we had temporarily commented out while they were being repaired have been fully returned to service. A name server status page can be found at: http://www.surbl.org/nameservers-output.html Also in case we haven't already mentioned it, the name servers are now organized into letter names like a.surbl.org, b.surbl.org, ... through n.surbl.org, and each name round robins into two or three servers. As more are added, we will try to balance them all at three servers per name, so that traffic is balanced overall. Having more than one server per name lets us comment one out without needing to change NS records in the subdomain zone files and delegations, when maintenance on a particular name server needs to be done, etc. It also keeps the SURBL DNS packets smaller to have fewer name servers listed in the NS records. Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: Top SURBL DNS blocklist hits joins top whitelist hists
by Jeff Chan 17 Sep '04

17 Sep '04

To follow up on an earlier announcement, in addition to a list of the top SURBL DNS queries that hit whitelists: http://www.surbl.org/dns-queries.whitelist.counts.txt we've added a list of the top blocklist hits: http://www.surbl.org/dns-queries.blocklist.counts.txt Though the sample size is somewhat small at 32k queries over the trailing 48 hours, the data may perhaps be useful for expiring records from blocklists or checking whitelists. We can increase the sample size if anyone thinks it worthwhile. Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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ANNOUNCE: NEMX adds SURBL support to Power Tools for Exchange Server
by Jeff Chan 13 Sep '04

13 Sep '04

NEMX has added SURBL support to their Power Tools for Exchange Server spam and virus filter. http://www.nemx.com/products/powertools/ Jeff C. -- Jeff Chan mailto:jeffc@surbl.org http://www.surbl.org/

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