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420:"limited time only" phrase) might be assigned a score of +0.3. With a spam threshold of 5 (default as of SpamAssassin version 2.55), several other tests would usually have to fail for the mail to be classified as spam. On the other hand, some tests, such as those for invalid message IDs or years, result in a very high score being assigned, where even a single test can almost put a mail "over the edge".
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used in conjunction with the sources of spam may far exceed the average user's capability. For instance, graphic-only spam messages have no text to compare to therefore checking the sender's originating mailserver and included links against various databases of known e-mail abusers enables the prevention of unnecessary or non-personal mail getting through to the end user.
416:, and if these expressions match, the email is assigned a certain score, depending on the test, and several (customizable) headers are added to the mail. The total score resulting from all tests or other criteria can then be used by the end user or by the ISP to set the conditions under which email is moved to a separate spam folder, deleted, flagged etc.
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attachment, with a brief excerpt in the message body, and a description of the tests which resulted in the mail being classified as spam. If the score is lower than the defined settings, by default the information about the passed tests and total score is still added to the email headers and can be
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as one of the most effective spam filters, especially when used in combination with spam databases. While simple text-matching alone may, for most users, be sufficient to correctly classify a majority of incoming mail the complexity involved in the combination of the comparison of words and symbols
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Each test has a label and a description. The label is usually an all upper case identifier separated with underscores, such as "LIMITED_TIME_ONLY", with the description for that label being "Offers a limited time offer". A mail that fails that test (in this case, contains certain variants of the
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can be called for individual emails. Regardless of the method used to perform the learning, SpamAssassin's
Bayesian test will subsequently assign a higher score to e-mails that are similar to previously received spam (or, more precisely, to those emails that are different from
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When a mail's total score is higher than the "required_score" setting in SpamAssassin's configuration, the mail is treated as spam and rewritten according to several options. In the default configuration, the content of the mail is appended as a
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SpamAssassin comes with a large set of rules which are applied to determine whether an email is spam or not. To decide, specific fields within the email header and the email body are typically searched for certain
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test file. If this string is inserted in a RFC 2822 formatted message and passed through the SpamAssassin engine, SpamAssassin will trigger with a weight of 1000.
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showing that SpamAssassin received 69% of the vote for "best Linux-based anti-spam solution."
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is a hosted spam and virus solution that uses SpamAssassin as part of the filtering process
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who had maintained a number of patches against an earlier program named
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E-mail recognized as spam by SpamAssassin, here in the
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containing many very good rules for filtering with SA.
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in ways similar to previously received spam e-mails).
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based on content-matching rules, which also supports
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by Mark
Jeftovic, which in turn was begun in August
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699:OpenProtect's SpamAssassin sa-update channel
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613:- "A Free Anti-Virus and Anti-Spam Filter"
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74:Revision as of 22:59, 22 March 2007 by
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568:with the trademark holder's permission
493:as a means to tell 'ham' from 'spam'.
469:or URIBL.com which track spam websites
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725:If a spam email MENTIONS a known-bad
723:SURBL -- Spam URI Realtime Blocklists
649:Spamnix is also based on SpamAssassin
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474:Distributed Checksum Clearinghouses
472:checksum-based filters such as the
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693:SpamAssassin Rules Emporium (SARE)
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60:. The present address (URL) is a
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452:Network-based filtering methods
768:The Apache Software Foundation
672:SpamAssassin official homepage
560:Like many open-source programs
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713:Vipul's Razor, on SourceForge
562:, the name "SpamAssassin" is
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456:SpamAssassin also supports:
316:SpamAssassin was created by
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705:Linux New Media Awards 2006
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372:) that communicates with a
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718:Pyzor, also on SourceForge
554:GNU General Public License
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682:Links for german users
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362:standalone application
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566:and may only be used
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163:The SpamAssassin team
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147:File:SpamAssassin.png
1615:Free e-mail software
574:Testing SpamAssassin
407:Anti-spam techniques
352:-based application (
45:22:59, 22 March 2007
414:regular expressions
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111:← Previous revision
829:Apache HTTP Server
546:Apache License 2.0
506:Bayesian filtering
500:Bayesian filtering
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354:Mail::SpamAssassin
348:SpamAssassin is a
305:generally regarded
287:Apache License 2.0
261:Apache License 2.0
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653:Kerio MailServer
550:Artistic License
540:SpamAssassin is
429:Novell Evolution
344:Methods of usage
303:SpamAssassin is
283:computer program
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123:Newer revision →
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22:old revision
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659:MailLaunder
611:MailScanner
597:open source
564:trademarked
542:open source
401:.procmailrc
385:mail filter
291:e-mail spam
181:February 14
20:This is an
1599:Categories
1468:Deltacloud
1254:Subversion
1144:OрenOffice
1029:Jackrabbit
969:FreeMarker
894:CloudStack
879:CarbonData
859:Bloodhound
645:SpamKiller
635:AntibodyMX
623:MIMEDefang
322:filter.plx
197:Repository
1463:Continuum
1384:Incubator
1337:ZooKeeper
1294:Trafodion
1284:TinkerPop
984:Guacamole
944:Empire-db
929:Directory
884:Cassandra
775:Top-level
687:sa-update
294:filtering
289:used for
1583:Category
1557:Licenses
1498:Marmotta
1329:XMLBeans
1309:Velocity
1269:Tapestry
1264:SystemDS
1259:Superset
1249:Struts 2
1244:Struts 1
1199:RocketMQ
1104:NetBeans
1084:mod_perl
974:Geronimo
864:Brooklyn
794:Airavata
789:ActiveMQ
784:Accumulo
777:projects
590:See also
552:and the
530:non-spam
525:sa-learn
521:sa-learn
514:sa-learn
483:Hashcash
393:procmail
364:or as a
334:April 20
87:contribs
38:contribs
1538:Tuscany
1533:Stanbol
1493:Jakarta
1488:Harmony
1448:Beehive
1391:Taverna
1375:Logging
1347:Commons
1164:Phoenix
1159:Parquet
1139:OpenNLP
1134:OpenJPA
1129:OpenEJB
1089:MyFaces
1014:Iceberg
909:CouchDB
904:Cordova
889:Cayenne
869:Calcite
799:Airflow
605:Citadel
312:History
267:Website
256:License
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1478:Giraph
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1289:Tomcat
1274:Thrift
1194:Roller
1154:PDFBox
1094:Mynewt
1069:Mahout
1064:Lucene
1044:JMeter
1024:Impala
1019:Ignite
994:Hadoop
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914:cTAKES
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809:Ambari
804:Allura
641:McAfee
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374:daemon
366:client
1528:Sqoop
1523:Slide
1518:Shale
1513:River
1503:MXNet
1458:Click
1443:AxKit
1431:Attic
1422:Log4j
1407:Batik
1370:Jelly
1333:Yetus
1319:Xalan
1234:Storm
1229:Spark
1219:Sling
1214:SINGA
1209:Shiro
1204:Samza
1184:Pivot
1179:Pinot
1124:Oozie
1119:OFBiz
1114:NuttX
1109:Nutch
1074:Maven
1059:Kylin
1049:Kafka
1034:James
1004:Helix
999:HBase
964:Flume
959:Flink
949:Felix
939:Druid
934:Drill
924:Derby
874:Camel
849:Axis2
824:Arrow
819:Aries
731:SURBL
617:KMail
584:EICAR
580:GTUBE
467:SURBL
378:spamd
370:spamc
281:is a
1543:Wave
1483:Hama
1473:Etch
1438:Apex
1355:BCEL
1304:UIMA
1279:Tika
1224:Solr
1189:Qpid
1099:NiFi
1079:MINA
1054:Kudu
1039:Jena
1009:Hive
989:Gump
954:Flex
854:Beam
844:Axis
839:Avro
476:and
438:MIME
397:pipe
358:CPAN
350:Perl
338:2001
326:1997
244:Type
210:.org
185:2007
127:diff
121:) |
119:diff
107:diff
83:talk
34:talk
1548:XML
1508:ODE
1417:Ivy
1412:FOP
1360:BSF
1174:Pig
1169:POI
1149:ORC
919:CXF
834:APR
814:Ant
727:URL
510:and
356:in
332:on
298:DNS
206:svn
43:at
1601::
570:.
556:.
340:.
336:,
183:,
113:|
109:)
85:|
36:|
760:e
753:t
746:v
733:.
376:(
368:(
216:/
129:)
125:(
117:(
105:(
100:)
92:(
89:)
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70:.
57:)
49:(
40:)
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