Antispam features
Antispam features


IDMail ServerDNSBLSURBLSpamtrapsGreylistingSPFDKIMDMARCTarpitBayesian filtersRegular expressionsEmbedded AntivirusEmbedded Antispam
31PostfixYes??YesYesOptionalOptional?Optional with spamassassin etc.YesOptional (via content filter interface)Optional (viacontent filterinterface)
32qmail???Yes????No?NoNo
33SendmailYesYes (via milter/SA)?YesOptionalOptionalOptional?Optional with spamassassin etc.?Yes ClamAVYesSpamAssassin
34SparkEngine????????????
35Synovel CollabsuiteYesYesYesYesYes???YesYesYesClamAVYesSpamAssassin
36UW IMAP????????????
37WinGate????????????
38Xeams??YesYesYes?????Optional ClamAVYes (Proprietary)
39ZarafaExternalExternalExternalExternalExternalExternalExternalExternalExternalExternalExternalExternal
40ZimbraYes???YesYes?YesYes?Yes ClamAVYesSpamAssassin

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