Features
Features


IDMail serverSupport Linux/UnixSupport WindowsSupport Windows1SMTPPOP3IMAPIMAP IDLESMTPoverTLSPOPoverTLSIPv6NNTPSSLWebmailActiveSyncStorage (Database)Storage (Filesystem)Storage (Other)Users License
1agorum coreYesYesNoYesNoYes?NoNo?NoYesYesNoYesNoNoGPLv2
2Apache JamesYesYesYesYesYesYesYesYesYes?YesYesNoNoYesYesNoASLv2
3AtmailYesNoYesYesYesYesYesYesYes?NoYesYesYesYesYesNoProprietary (100 user/30 day demo)
4AxigenYesYesNoYesYesYesYesYesYesNoNoYesAjax & BasicYesNoNoYesProprietary (free version: email 5 users / calendar 5 users)
5BlueMindYesNoNoYesYesYesYesYesYes?NoYesYesYesYesYesYesAGPL v3
6CitadelYesNoYesYesYesYesNoYesYesYes?YesYesNoYesNoNoGPLv3
7CommuniGate ProYesYesYesYesYesYesYesYesYesYesNoYesYesYesYesYesYesProprietary (Free for up to 5 users)
8Courier Mail ServerYesNoYesYesYesYesYesYesYesYes?YesYesNoNomaildirNoGPLv3
9Cyrus IMAPYesNoYesNoYesYesYesNoYesYesYesYesNoNoYes (indexes)YesYes4-clause BSD
10DovecotYesNoYesNoYesYesYesNoYesYesNoYesNoNoYesmaildir, mbox, dboxNoMixed: MIT andLGPL 2.1
11Eudora Internet Mail ServerNoNoYesYesYesYes?NoNo?NoNoNoNoNoNoYesProprietary
12EximYesYes (via Cygwin)YesYesDovecot,UW IMAPDovecot,UW IMAPDovecot,UW IMAPYesNoYesNoYesNoNoYesYesNoGPLv2+
13FirstClassYesYesYesYesYesYes?YesYes?YesYesYesYesYesYesYesProprietary
14Gordano Messaging SuiteYesYesNoYesYesYes?YesYes?NoYesYesNoYesYesYesProprietary
15GroupWiseYesYesNoYesYesYes?YesYes??YesYesYesYesNoNoProprietary
16HarakaYesYesYesYesNoNoNoYesNoYesNoYesNoNoYesYesYesMIT
17hMailServerNoYesNoYesYesYesYesYesYesYesNoYesYesNoYesYesNoGNU AGPL
18IBM Lotus DominoYesYesNoYesYesYes?YesYes?YesYesYesYesYesNoNoProprietary
19IceWarp Mail ServerYesYesNoYesYesYesYesYesYesYesNoYesYesYesYesYesNoProprietary
20Ipswitch IMail ServerNoYesNoYesYesYes?YesYes?NoYesYesYesNoYesNoProprietary
21Kerio ConnectYesYesYesYesYesYesYesYesYesNoYesYesYesYesYesYesNoProprietary
22KolabYesNoNoYesYesYesYesYesYesYesYesYesYesYesYesYesYesGPLv3
23MagicMailYesNoNoYesYesYes?YesYes?NoYesYesNoYesYesYesProprietary
24MailenableNoYesNoYesYesYesYesYesYesYesNoYesYesYesYesYesNoProprietary
25MailsiteNoYesNoYesYesYes?YesYes?NoYesYesYesYesYesYesProprietary
26MailtraqNoYesNoYesYesYesYesYesYes?YesYesYesNoYesYesYesProprietary
27MDaemon Messaging ServerNoYesNoYesYesYesYesYesYesYesNoYesYesYesYesYesNoProprietary
28Mercury Mail Transport SystemNoYesNoYesYesYesYesYesYes?NoYesYesNoNoYesNoProprietary donationware
29Microsoft Exchange ServerNoYesNoYesYesYesYesYesYesYes (2007 sp1 onwards)YesYesYesYesESE onlyYes (up to 2003 only)YesProprietary
30MomentumYesNoNoYesNoNoNoYesNoYesNoYesNoNoYesYesNoProprietary

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