Welcome to SpamAssassin

SpamAssassin is a mature, widely-deployed open source project that serves as a mail filter to identify Spam. SpamAssassin uses a variety of mechanisms including header and text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases. SpamAssassin runs on a server, and filters spam before it reaches your mailbox. Read more about SpamAssassin.

Spamassassin Help

Get Involved

Want to be part of the process and contribute to the development of SpamAssassin software or SpamAssassin documentation? You to can become part of the team. Here's how:

Starting Points: FAQs, List of labels used for pages in this online manual, and Information about installing.

Editing This Wiki

Help edit our Wiki - You can edit these pages! Send a brief request to the dev@ list to be given edit access to the wiki including your wiki username. No mailing list subscription required.

List of all pages

Space Index

Total number of pages: 577

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Page: 320ReleaseSummary


Page: AboutClas
Page: AboutSpamAssassin
Page: AdjustRuleScore
Page: AlistairMcDonald
Page: AllSpamToFiltering
Page: AllSpamToNoFiltering
Page: AlwaysSpamWithTswitch
Page: AmavisdNewTrouble
Page: AntiPhishFakeUrlRule
Page: Apache SpamAssassin Report to Board for June 2019
Page: Apache SpamAssassin report to Board for December 2019
Page: Apache SpamAssassin report to Board for December 2020
Page: Apache SpamAssassin report to Board for December 2021
Page: Apache SpamAssassin report to Board for December 2022
Page: Apache SpamAssassin report to Board for June 2020
Page: Apache SpamAssassin report to Board for June 2021
Page: Apache SpamAssassin report to Board for June 2022
Page: Apache SpamAssassin report to Board for June 2023
Page: Apache SpamAssassin report to Board for March 2020
Page: Apache SpamAssassin report to Board for March 2021
Page: Apache SpamAssassin report to Board for March 2022
Page: Apache SpamAssassin report to Board for March 2023
Page: Apache SpamAssassin report to Board for March 2024
Page: Apache SpamAssassin report to Board for October 2019
Page: Apache SpamAssassin report to Board for September 2020
Page: Apache SpamAssassin report to Board for September 2021
Page: Apache SpamAssassin report to Board for September 2022
Page: Apache SpamAssassin report to Board for September 2023
Page: ApacheCon
Page: ArgumentWithUnderscoreIsntNumeric
Page: ArikFunke
Page: AskingAboutIntegrations
Page: AskingQuestions
Page: AssassinDeamon
Page: AuthzUserPlugin
Page: AutolearningNotWorking
Page: AutoMassChecks
Page: AutoRuleUpdates
Page: AutoWelcomelist
Page: AutoWhitelist
Page: AutoWhitelistExpiry
Page: AvoidingFpsForAdmins
Page: AvoidingFpsForSenders
Page: AwlWrongWay


Page: BasicConfiguration
Page: BattingAverage
Page: BayesAccuracy
Page: BayesBenchmark
Page: BayesBenchmarkResults
Page: BayesBitMe
Page: BayesExpiration
Page: BayesFaq
Page: BayesFeedbackViaForwarding
Page: BayesForceExpire
Page: BayesInSpamAssassin
Page: BayesMigration
Page: BayesNotWorking
Page: BayesSqlClearUsers
Page: BayesStopList
Page: BecomingCommitter
Page: BecomingPmc
Page: BerndHSteiner
Page: BetterDocumentation
Page: BetterDocumentation GeneralDiscussion
Page: BetterDocumentation InstallTxt
Page: BetterDocumentation LdapReadme
Page: BetterDocumentation ReadmeTxt
Page: BetterDocumentation SpamdReadme
Page: BetterDocumentation SqlReadme
Page: BetterDocumentation SqlReadmeAwl
Page: BetterDocumentation SqlReadmeBayes
Page: BetterDocumentation UsageTxt
Page: BlackSpider
Page: BlogSpamAssassin
Page: Board Reports
Page: BobMenschel
Page: BobProulx
Page: BodyTestsPl
Page: BogusSpamStatusHeader
Page: BooksAboutSpamAssassin
Page: BradBulger
Page: BrainStorming
Page: BretMiller
Page: Bug Writing Guidelines
Page: BugZilla
Page: BuildBot
Page: BuildBotIndex
Page: BuildBotUpgradeNotes
Page: BuildingOnSunOS4
Page: BuildSpamcOnWindowsForFree


Page: CachingNameserver
Page: CalebPhillips
Page: CanIt
Page: CantCallMethodBgsend
Page: CantLocateNoMailAudit
Page: CasperTone2003
Page: CatalinIonescu
Page: CeasNotesJustin
Page: ChangeLog
Page: Changes301
Page: Changes302
Page: Changes303
Page: Changes304
Page: ChangingMarkup
Page: CharlieScott
Page: ChooseYourRules
Page: ChristianHansen
Page: ClamAVMultipleScores
Page: ClamAVPlugin
Page: ClaVettingProcess
Page: CodingStyle
Page: CollaborativeManual
Page: CommercialISPs
Page: CommercialMacOSX
Page: CommercialMaybe
Page: CommercialNetworkAppliances
Page: CommercialProducts
Page: CommercialUnix
Page: CommercialWindows
Page: CommuniGate
Page: CompileOnWindows
Page: ConfFileOrder
Page: ConnectionManagementSystems
Page: ContinuousTesting
Page: ContributingNewRules
Page: CordBeermann
Page: Corpora
Page: CorpusCleaning
Page: CorpusNightlyScript
Page: CraigHughes
Page: CraigMacdonald
Page: CustomDeleteTag
Page: CustomPlugins
Page: CustomRulesets


Page: DallasEngelken
Page: DanielLemke
Page: DanielQuinlan
Page: DanKohn
Page: Darxus
Page: DarylC.W
Page: DateRev
Page: DavidCary
Page: DbDumpAndLoad
Page: DbFileSleepBug
Page: DBIPlugin
Page: DebugChannels
Page: DeepRecursionInDbFile
Page: DeletingAllMailsMarkedSpam
Page: DetlevLengsfeld
Page: DevBookmarks
Page: DevelopmentMode
Page: DevelopmentStuff
Page: DirQueue
Page: DisableAutoRuleUpdates
Page: DisablingRules
Page: DnsblAccuracy082005
Page: DnsBlocklists
Page: DnsBlocklistsInclusionPolicy
Page: DontBlockTheBat
Page: Dovecot
Page: DownloadFromSvn
Page: DoYouWantMyHam
Page: DoYouWantMySpam
Page: DumpTextPlugin
Page: DuncanFindlay
Page: DynablockIssues


Page: EnvelopeSenderInHeaders
Page: EnvelopeSenderInReceived
Page: EraEriksson
Page: EugeneLarvie
Page: EximProcmailCorruptMsgs
Page: ExperimentalTheoretical


Page: FalseNegative
Page: FalseNegatives
Page: FalsePositive
Page: FalsePositives
Page: FasterPerformance
Page: FeatureList
Page: FilteringViruses
Page: FindingIntegrations
Page: FixingAllTrusted
Page: FixingBadLearning
Page: FixingErrors
Page: FpFnPercentages
Page: FqdnError
Page: Frame Construction Series Jaw Crusher
Page: FredTarasevicius
Page: FrequentlyAskedQuestions
Page: FromNotReplyTo
Page: FuzzyOcrPlugin


Page: GadiCohen
Page: GeneticAlgorithm
Page: Grassfindlinks


Page: Ham
Page: HandClassifiedCorpora
Page: HashBuster
Page: HashCash
Page: HashSharingSystem
Page: Hege
Page: HeinoBackhaus
Page: HenrikKrohns
Page: HenryStern
Page: HistoricNews
Page: HitFrequencies
Home page: Home
Page: HomePage
Page: HomerClar
Page: HowScoresAreAssigned
Page: HowToDebug
Page: HowToTellWhatsGoingOn


Page: IanNeubert
Page: IgorBerger
Page: IgorBergerTalk
Page: ImportantInitialConfigItems
Page: ImproveAccuracy
Page: IncreaseAccuracy
Page: IncubatorToDo
Page: InfinityMail
Page: InfraNotes
Page: InfraNotes GrantingKarma
Page: InfraNotes2017
Page: InfraNotes2020
Page: InstallingDCC
Page: InstallingOnMacHighSierra
Page: InstallingOnWindows
Page: InstallingPyzor
Page: InstallingRazor
Page: IntegratedInCourierUsingMaildrop
Page: IntegratedInMta
Page: IntegratedInMua
Page: IntegratedInPostfixWithAmavis
Page: IntegratedInQmailWithIfspamh
Page: IntegratedInQmailWithQmailScanner
Page: IntegratedSolutions
Page: IntegratedSpamdInPostfix
Page: IntegratePostfixViaSpampd
Page: IntegratingSA
Page: InTheNews
Page: IoSocketInetInvalidArgument
Page: Ipv6Resolver
Page: IRC
Page: Ivo Truxa
Page: IXhash


Page: JamesBlessing
Page: Jidanni
Page: JohnHardin
Page: JonathanBuhacoff
Page: JosefRadinger
Page: JustinMason


Page: KellyAnderson
Page: KevinMcGrail
Page: KurtYoder
Page: KymaqeLubywen


Page: LarsOlson
Page: LearningMarkedUpMessages
Page: LearnMore
Page: Loaf
Page: LocalCfNotRead
Page: LocalSpellingWords
Page: LogoContest
Page: LogoContestDiscussion
Page: LogoContestEntries
Page: LogoContestTiebreaker
Page: LogoDetails


Page: MailAuditBodyError
Page: MailingLists
Page: MailManglingInTheField
Page: MailPoint
Page: MailProxy
Page: MailScanner
Page: MakeMissingSeparator
Page: MalteStretz
Page: ManualNightlyMassCheck
Page: ManualRuleUpdates
Page: ManualWhitelist
Page: ManuxMike
Page: MassCheck
Page: MasscheckAntidrug
Page: MasscheckBackhair
Page: MasscheckBigEvil
Page: MasscheckBlacklist
Page: MasscheckBogusVirus
Page: MasscheckChickenpox
Page: MasscheckChineserules
Page: MasscheckEvilNumbers
Page: MasscheckGeeWhizChineseRuleset
Page: MasscheckRandom
Page: MassChecks
Page: MassCheckSlave
Page: MasscheckTripwire
Page: MasscheckWeeds
Page: MassesOverview
Page: MattKettler
Page: MaxClientsWarning
Page: MeasuringAccuracy
Page: MessageLabs
Page: MichaelDouma
Page: MichaelMonnerie
Page: MichaelParker
Page: MikeBrown
Page: MIMEDefang
Page: MissedSpam
Page: MortenIsaksen
Page: MtaFilterNotWorking
Page: MtaIntegrationDevNotes
Page: MultiFileRuleSets


Page: NetIdentPrototype
Page: NetTestFirewallIssues
Page: NetworkTests
Page: NetworkTestsLatency
Page: NewTrapsPlan
Page: NewUploadedCorporaUser
Page: NextRelease
Page: NightlyMassCheck
Page: NoProcessOnOverload
Page: NotSpam


Page: OcrPlugin
Page: OeFilter
Page: OeSixForwardFps
Page: OliverSchulzeL
Page: OpenDnsAndUribls
Page: OpenInfraIssues
Page: OpenProtect
Page: OpensslKrb
Page: OtherTricks
Page: OutOfFileDescriptors
Page: OutOfMemoryProblems


Page: ParkerMorse
Page: PaulLaudanski
Page: Perceptron
Page: PerlAccessorsConsideredHarmful
Page: PeterDrenth
Page: PeterGervai
Page: PluginWritingTips
Page: PluralOfCorpus
Page: PlussedEmail
Page: Pod2ManRedHat
Page: Pop3Proxy
Page: POPAuthPlugin
Page: Porkchop
Page: PostfixSpamd
Page: PrecisionAndRecall
Page: PredictiveValue
Page: PreflightBuildBot
Page: PreflightByMail
Page: PresentationsAndPapers
Page: PressContacts
Page: ProcmailTaintWarning
Page: ProcmailToForwardMail
Page: ProcmailVsSmrsh
Page: ProfilingRulesWithDprof
Page: ProjectRoles
Page: PublicRules
Page: PublishingRuleUpdates
Page: PythonLanguage


Page: QmailSpfPatch


Page: RazorAmavisd
Page: RazorBadFileDesc
Page: RazorCantLocateNew
Page: RazorHowToTell
Page: RazorInsecureDependency
Page: RazorSiteWide
Page: RazorUnblessedRefs
Page: RBL
Page: RedHatMalformedUtf8
Page: RelayCountryPlugin
Page: RelayedByDialup
Page: Release310Schedule
Page: Release320Schedule
Page: ReleaseGoals
Page: ReleasePolicy
Page: RemoteImapFolder
Page: RemovedRulesets
Page: RemovingBugzillaSpam
Page: RenataBignardi
Page: ReplaceTags
Page: Report spam
Page: ReportingBugs
Page: ReportingMboxesToRazor
Page: ReportingSpam
Page: ReportingToRazor
Page: RescoreDetails
Page: RescoreDetails310
Page: RescoreDetails320
Page: RescoreMassCheck
Page: RescoreMassCheck310
Page: RescoreMassCheck320
Page: RescoreSet01Details
Page: RescoreSet23Details
Page: RescoreTenFcv
Page: RescoringProcess
Page: ResendingMailWithHeaders
Page: Rfc822Format
Page: Richardkreider
Page: RocGraphs
Page: RodBegbie
Page: RodRoark
Page: RoundingIssues
Page: RsyncAccounts
Page: RsyncConfig
Page: RuleDevelopment
Page: RuleFilenameConventions
Page: RuleLifeCycle
Page: RuleQaApp
Page: RuleSandboxes
Page: RulesNotEnglish
Page: RulesProjBuildBot
Page: RulesProjCompiler
Page: RulesProjectPlan
Page: RulesProjMoreInput
Page: RulesProjPromotion
Page: RulesProjSandboxes
Page: RulesProjSecrecy
Page: RulesProjStreamlining
Page: RuleUpdates
Page: RunningGa
Page: RunningPerceptron
Page: RunningSaUpdate


Page: Sa-learn
Page: Sa263MakeWithPerl582
Page: SaCompileRefSymbolError
Page: Salearn
Page: SaMilter030CorruptMsgs
Page: SaProxy
Page: SaProxyByHand
Page: SaProxyStatus
Page: SareChannels
Page: SaUpdateBackend
Page: SaUpdateKeyNotCrossCertified
Page: SaUpdateMirrorSetup
Page: SaUpdatePlan
Page: Scores
Page: ScottWilson
Page: Security
Page: SecurityPolicy
Page: SeparateLogFile
Page: Sergio
Page: Setting up a build/testing/release environment
Page: SettingUpSSL
Page: ShortcircuitingRuleset
Page: ShrinkAutoWhiteList
Page: SidneyMarkowitz
Page: SimoneHolly
Page: SingleUserUnixInstall
Page: SiteContest
Page: SiteWideBayesFeedback
Page: SiteWideBayesSetup
Page: SiteWideGeneralNotes
Page: SitewidePostfixBayes
Page: SitewideServerSpec
Page: SocNightlyMassCheck
Page: SoughtRules
Page: SourceForge
Page: Spam
Page: SpamArrow
Page: SpamAssassin
Page: SpamAssassin on Mac OS X Server
Page: SpamAssassinAsfZone
Page: SpamAssassinChallenge
Page: SpamAssassinDoesNotDoThat
Page: SpamAssassinHistory
Page: SpamAssassinRules
Page: SpamassNotFirstHop
Page: SpamCorral
Page: SpamdCoredumps
Page: SpamdKillingServer
Page: SpamdOnMacOsx
Page: SpamdOnWindows
Page: SpamdSyslogFormat
Page: SpamFilteringServices
Page: SpamFuProxy
Page: SpamKiller
Page: SpamMover
Page: SpamQuarantine
Page: SpamTrapBackend
Page: SpamTrapping
Page: SplitLogsIntoBuckets
Page: SqlOnWindows
Page: SslMassCheck
Page: StartUsing
Page: StatsAndAnalyzers
Page: StatsPlugin
Page: StatusRounding
Page: SteveCharmer
Page: StopBlockingMyMail
Page: StopBlockingOthersMail
Page: StorableNotFound
Page: SubjectRewrite
Page: SummerOfCode2006
Page: SvnBranches
Page: SvnCertUpdate
Page: SyncDebianPackaging


Page: TarasFetsyuk
Page: TenFoldCrossValidation
Page: Tengutech
Page: Testimonials
Page: TestingInstallation
Page: TestingSearch
Page: TextWrapError
Page: ThankTheTeam
Page: TheFaqHasMoved
Page: TheoVanDinter
Page: ThirdPartySoftware
Page: ThirdPartySoftware Monitoring
Page: TimHunter
Page: TomekSerafin
Page: TopSharedMemoryBug
Page: TotalCostRatio
Page: TranslateFrench
Page: TranslateText
Page: TrustedRelays
Page: TrustedRelaysDebugExample
Page: TrustNetNotes
Page: TrustPath
Page: TspamdHuptCompileError
Page: TurnTide
Page: TxRep


Page: UlfEdvinsson
Page: UnmaintainedCustomPlugins
Page: UpgradeNotes
Page: UpgradeTo300
Page: UpgradeTo310
Page: UpgradingVersion
Page: UploadedCorpora
Page: UploadedCorporaIndependentMassCheck
Page: URICountryPlugin
Page: UsedViaProcmail
Page: UserPrefRuleTest
Page: UsingAnAccountForLearning
Page: UsingBugzilla
Page: UsingDcc
Page: UsingMutt
Page: UsingNetworkTests
Page: UsingOnOsx
Page: UsingOnWindows
Page: UsingOverlap
Page: UsingProcmail
Page: UsingPyzor
Page: UsingRazor
Page: UsingSiteWide
Page: UsingSpamAssassin
Page: UsingSQL
Page: UsingTests
Page: Utf8Performance


Page: ValidateModel
Page: VBounceRuleset
Page: Vincent Li
Page: VirusScannerTypeUpdates
Page: VotingProcedure


Page: WebRedirectPlugin
Page: WebShield
Page: WebUserInterfaces
Page: WelcomelistBlocklist
Page: WeLoveVolunteers
Page: WesMorgan
Page: WhereDoLocalSettingsGo
Page: WhitelistFromRcvdAndTrust
Page: WhitelistingEverybody
Page: WhiteListSubjectPlugin
Page: WhyUseRules
Page: WikiNode
Page: WilliamStearns
Page: WinSpamC
Page: WritingRules
Page: WritingRulesAdvanced
Page: WrongMXPlugin


Page: X Spam Status




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