Comparison of mail servers
Appearance
This is a comparison of mail servers: mail transfer agents, mail delivery agents, and other computer software which provide e-mail services.
Linux-based mail servers are built using a number of components due to the fact that a Linux environment is, by default, a multi-user operating system. A stock Linux server already has internal mail. To allow the server to send external emails, a Mail Transfer Agent such as sendmail, postfix or exim is required. Mail is read either through direct access (shell login) or mailbox protocols like POP and IMAP.
Feature comparison
Radif | Server OS support | Features | Storage | Users | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mail server | Linux/Unix | Windows | Mac OS | SMTP | POP3 | IMAP | IMAP IDLE | SMTP over TLS | POP over TLS | IPv6 | NNTP | SSL | Webmail | ActiveSync | Database | Filesystem | Other | License |
agorum core | Yes | Yes | No | Yes | No | Yes | ? | No | No | ? | No | Yes | Yes | No | Yes | No | No | GPLv2 |
Apache James | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | No | No | Yes | Yes | No | ASLv2 |
Atmail | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | No | Yes | Yes | Yes | Yes | Yes | No | Proprietary (100 user/30 day demo) |
Axigen | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Ajax & Basic | Yes | No | No | Yes | Proprietary (free version: email 100 users / calendar 5 users) |
Citadel | Yes | No | Yes | Yes | Yes | Yes | ? | Yes | Yes | Yes | ? | Yes | Yes | No | Yes | No | No | GPLv3 |
CommuniGate Pro | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Proprietary (Free for up to 5 users) |
Courier Mail Server | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | No | No | maildir | No | GPLv3[1] |
Cyrus IMAP | Yes | No | Yes | No | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | No | No | Yes (indexes) | Yes | Yes | 4-clause BSD[2] |
DBMail | Yes | via Cygwin | Yes | Postfix, Exim, Sendmail, qmail | Yes | Yes | Yes | Postfix, Exim, Sendmail, qmail | Yes | Yes | ? | Yes | No | No | PostgreSQL, MySQL, SQLite | No | No | GPLv2[3] |
Digital Integration iMail5 | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | ? | No | Yes | Yes | No | Yes | Yes | Yes | Proprietary |
Dovecot | Yes[4] | No[4] | Yes[4] | No | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | No | No | Yes | maildir, mbox, dbox | No | Mixed: MIT and LGPL 2.1[5] |
Eudora Internet Mail Server | No | No | Yes | Yes | Yes | Yes | ? | No | No | ? | No | No | No | No | No | No | Yes | Proprietary |
Exim | Yes | Yes (via Cygwin) | Yes | Yes | Dovecot, UW IMAP | Dovecot, UW IMAP | Dovecot, UW IMAP | Yes | No | Yes | No | Yes | No | No | Yes | Yes | No | GPLv2+[6] |
FirstClass | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | ? | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Proprietary |
Gordano Messaging Suite | Yes | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | Yes | Yes | Yes | Proprietary |
GroupWise | Yes | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | ? | Yes | Yes | Yes | Yes | No | No | Proprietary |
Hexamail Server | Yes | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | No | Yes | No | Proprietary |
Mail server | Linux/Unix | Windows | Mac OS | SMTP | POP3 | IMAP | IMAP IDLE | SMTP over TLS | POP over TLS | IPv6 | NNTP | SSL | Webmail | ActiveSync | Database | Filesystem | Other | License |
hMailServer | No | Yes | No | Yes | Yes | Yes | Yes | V 5.0 | V 5.0 | Yes | No | V 5.0 | Yes | No | Yes | No | No | GNU GPL (V5.0 Proprietary) |
IBM Lotus Domino | Yes | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | Yes | Yes | Yes | Yes | Yes | No | No | Proprietary |
IceWarp Mail Server | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | No | Proprietary |
IndiMail | Yes | No | Yes | Yes | Yes | Yes | ? | Yes | Yes | Yes | No | Yes | No | No | Yes | Yes | No | GPLv3 |
Ipswitch IMail Server | No | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | Yes | No | Yes | No | Proprietary |
JMail | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Proprietary |
Kerio Connect | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | ? | Yes | Yes | Yes | Yes | Yes | Yes | No | Proprietary |
Kolab | Yes | No | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | GPLv3 |
MagicMail | Yes | No | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | Yes | Yes | Yes | Proprietary |
Mailismus | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | ? | No | Yes | No | No | Yes | Yes | No | Proprietary (28-day free demo) |
Mailsite | No | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | Yes | Yes | Yes | Yes | Proprietary |
Mailtraq | No | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | Yes | No | Yes | Yes | Yes | Proprietary |
masqmail | Yes | No | Yes | Yes | No | No | No | Yes | No | Yes | No | Yes | No | No | No | Yes | Yes | GPL |
MDaemon Mail Server | No | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes | Yes [Requires one time fee] [7] | Yes [Requires one time fee] | Yes | No | Proprietary |
Mercury Mail Transport System | No | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | No | Yes | No | Proprietary donationware |
Microsoft Exchange Server | No | Yes | No | Yes | Yes | Yes | Yes[8][9] | Yes | Yes | Yes (2007 sp1 onwards)[10] | Yes | Yes | Yes | Yes | ESE only | Yes (up to 2003 only)[11] | Yes | Proprietary |
Mirapoint | Yes | No | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | Yes | Yes | Yes | Proprietary |
NetMail | Yes | Yes | No | Yes | Yes | Yes | ? | Yes | Yes | ? | ? | Yes | Yes | No | Yes | No | No | Proprietary |
OpenSMTPD | Yes | No | Yes | Yes | No | No | No | Yes | No | Yes | No | Yes | No | No | possible through custom backends | Yes | No | ISC |
Open-Xchange | Yes | No | No | Yes | Yes | Yes | ? | Yes | Yes | ? | ? | Yes | Yes | Yes | Yes | No | No | Proprietary/SaaS, with open-source parts[12] |
Mail server | Linux/Unix | Windows | Mac OS | SMTP | POP3 | IMAP | IMAP IDLE | SMTP over TLS | POP over TLS | IPv6 | NNTP | SSL | Webmail | ActiveSync | Database | Filesystem | Other | License |
Oracle Communications Messaging Server | Yes | No | No | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | Yes | No | Yes | Yes | No | Proprietary |
Postfix | Yes | No | Yes | Yes | Dovecot, UW IMAP | Dovecot, UW IMAP | Dovecot, UW IMAP | Yes | No | Yes | No | Yes | No | No | Yes | Yes | Yes | IBM Public License |
qmail | Yes | No | Yes | Yes | Yes | Dovecot, UW IMAP | Dovecot, UW IMAP | No | Dovecot, UW IMAP | via Qsmtp | ? | No | No | No | (cdb) | Yes | No | Public domain |
Qpopper | Yes | via Cygwin | Yes | No | Yes | No | No | No | Yes | ? | No | Yes | No | No | No | Yes | Yes | BSD-style, GPL-incompatible[13] |
Sendmail | Yes | No | Yes | Yes | Dovecot, UW IMAP | Dovecot, UW IMAP | Dovecot, UW IMAP | Yes | No | Yes | No | Yes | No | No | ? | Yes | ? | Sendmail License |
SparkEngine | Yes | Yes | Yes | Yes | No | No | No | Yes | No | ? | No | Yes | No | No | Yes | Yes | Yes | Proprietary |
SurgeMail | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | No | Yes | Yes | Yes | Proprietary (free for up to 5 users) |
Synovel Collabsuite | Yes | No | No | Yes | Yes | Yes | ? | Yes | Yes | ? | ? | Yes | Yes | No | Yes | Yes | ? | Proprietary with OSS parts, Freeware and paid editions[14] |
UW IMAP | Yes | Yes | Yes | No | Yes | Yes | Yes | No | Yes | ? | No | Yes | WebPine | No | Yes (Indexes) | Yes | No | Apache License 2.0[15] |
WinGate | No | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes | No | No | Yes | No | Proprietary |
Xeams | Yes | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | ? | No | Yes | No | No | No | Yes | No | Freeware with support option |
Zarafa | Yes | No | No | External[16] | Yes | Yes | Yes | External[16] | Yes | No | No | Yes | Yes | Yes | Yes | Yes | No | AGPLv3, free and paid editions[17] |
Zimbra | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes | Yes | No | ZPL and proprietary editions[18] |
Mail server | Linux/Unix | Windows | Mac OS X | SMTP | POP3 | IMAP | IMAP IDLE | SMTP over TLS | POP over TLS | IPv6 | NNTP | SSL | Webmail | ActiveSync | Database | Filesystem | Other | License |
Radif | Server OS support | Features | Storage | Users |
Authentication
Mail server | SMTP AUTH | POP before SMTP | APOP | Filesystem | Database | LDAP | Other |
---|---|---|---|---|---|---|---|
agorum core | Yes | No | No | No | Yes | Yes | PLAIN, LOGIN, CRAM-MD5, NTLM |
Apache James | Yes | ? | ? | ? | Yes | Yes | PLAIN, LOGIN |
Atmail | Yes | Yes | Yes | Yes | Yes | Yes | PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5, Active Directory, any LDAP-compatible source |
Axigen | Yes | No | Yes | No | No | Yes | GSSAPI, CRAM-MD5, DIGEST-MD5, APOP, CLRTXT, LOGIN, PLAIN, LDAP, Internal |
CommuniGate Pro | Yes | Yes | Yes | Yes | Yes | Yes | Active Directory (LDAP), CLRTXT, CRAM-MD5, DIGEST-MD5, APOP, GSSAPI, NTLM, MSN, SESSIONID, External Authentication Plug-in. Also supports X.509 PKI auth via STARTTLS/SSL |
Courier Mail Server | Yes | Yes | Yes | Yes | Yes | Yes | Managed by Courier authentication library which can use PAM, Userdb, PostgreSQL(beta), MySQL, LDAP, and EXTERNAL. |
Cyrus IMAP | No | Yes | Yes | Yes | Yes | Yes | Supports all Cyrus SASL authentication methods. Also supports X.509 PKI auth via STARTTLS and EXTERNAL. |
Cyrus SASL Library | No | Yes | Yes | Yes | Yes | Yes | Berkeley DB, GDBM, or NDBM (sasldb), PAM, MySQL, PostgreSQL, SQLite, LDAP, Active Directory(LDAP), DCE, Kerberos 4 and 5, proxied IMAP auth, getpwent, shadow, SIA, Courier Authdaemon, httpform, APOP and SASL mechanisms: ANONYMOUS, CRAM-MD5, DIGEST-MD5, EXTERNAL, GSSAPI, LOGIN, NTLM, OTP, PASSDSS, PLAIN, SRP |
Digital Integration iMail5 | Yes | No | Yes | No | No | No | |
Dovecot | No | Yes | Yes | Yes | Yes | Yes | Not an SMTP server, but offers SASL to MTAs. http://wiki.dovecot.org/DovecotFeatures http://wiki.dovecot.org/Authentication. POP-before-SMTP via DRAC plugin. PAM, MySQL, PostgreSQL, SQLite, LDAP, Active Directory(LDAP), Kerberos 5, proxied IMAP auth, getpwent, shadow, SIA, BSDauth, Vpopmail. APOP and SASL mechanisms: ANONYMOUS, PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5, SCRAM-SHA1, EXTERNAL, GSSAPI, NTLM, OTP, SKEY, RPA. |
Eudora Internet Mail Server | Yes | No | Yes | Yes | No | No | CRAM-MD5, DIGEST-MD5, PLAIN, LOGIN |
Exim | Yes | Yes | Yes | Yes | Yes | Yes | Cyrus SASL, Dovecot SASL, CRAM-MD5, PLAIN, LOGIN, SPA |
FirstClass | Yes | ? | ? | Yes | Yes | Yes | |
Gordano Messaging Suite | Yes | Yes | Yes | No | Yes | Yes | PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5, APOP, ODBC, Active Directory, NT Domain |
GroupWise | Yes | Yes | Yes | Yes | Yes | Yes | eDirectory, Any LDAPv3-compliant source |
Hexamail Server | Yes | Yes | Yes | Yes | No | Yes | CLRTXT, CRAM-MD5, DIGEST-MD5, APOP, GSSAPI, NTLM, MSN, SESSIONID |
IceWarp Mail Server | Yes | Yes | Yes | Yes | Yes | Yes | PLAIN, LOGIN, CRAM-MD5, NTLM |
IndiMail | Yes | Yes | No | Yes | Yes | Yes | CLRTXT, PLAIN, LOGIN, CRAM-MD5, CRAM-SHA1, CRAM-RIPEMD, DIGEST-MD5, APOP, Checkpassword, authindi, authldap, Pluggable Authentication Modules, Name Service Switch |
Ipswitch IMail Server | Yes | No | Yes | Yes | Yes | Yes | Active Directory, Windows authentication, CRAM-MD5, PLAIN, LOGIN |
JMail | Yes | No | Yes | No | No | No | CRAM-MD5, PLAIN, LOGIN, APOP, HTTP DIGEST. Authentication through a JID system |
Kolab | Yes | Yes | Yes | Yes | Yes | Yes | Kolab employs Cyrus and Postfix and thus supports all Cyrus SASL authentication methods and X.509 PKI auth via STARTTLS and EXTERNAL. |
Kerio Connect | Yes | Yes | Yes | Yes | No | Yes | Active Directory, Apple Open Directory, ActiveSync, Pluggable Authentication Modules |
MagicMail | Yes | No | No | Yes | Yes | No | ? |
Mailismus | Yes | No | Yes | Yes | No | No | LOGIN, PLAIN, CRAM-MD5, EXTERNAL |
Mailsite | Yes | No | Yes | Yes | Yes | Yes | NT Domain, Active Directory, PLAIN, LOGIN, NTLM, SCRAM-MD5, CRAM-MD5 |
Mailtraq | Yes | Yes | Yes | Yes | Yes | Yes | NT Domain, Active Directory, Local Directory |
MDaemon Mail Server | Yes | Yes | Yes | No | Yes | Yes | Active Directory, PLAIN, CRAM-MD5, LOGIN |
Mercury Mail Transport System | Yes | Yes | Yes | Yes | No | ? | Internal, LOGIN, PLAIN, CRAM-MD5, Netware, LDAP?, partial NT Domain |
Microsoft Exchange Server | Yes | ? | Yes | No | No | Yes | Active Directory, PLAIN, NTLM |
Mirapoint | Yes | Yes | Yes | Yes | Yes | Yes | Plaintext, LDAP, NTLM, APOP, Kerberos_v4, Kerberos_v5, Radius, Sessionid |
NetMail | Yes | Yes | Yes | Yes | Yes | Yes | eDirectory, LDAP |
Oracle Communications Messaging Server | Yes | Yes | Yes | Yes | Yes | Yes | Plain, Login, CRAM-MD5, Digest-MD5, Certificate |
OpenSMTPD | Yes | No | No | Yes | Yes | Yes | By default PLAIN and LOGIN over SSL only, Certificates, bsd_auth and PAM. Supports adding new authentication mechanisms through custom backends. |
Postfix | Yes | No | No | Yes | Yes | Yes | Supports all Cyrus SASL authentication methods except for APOP. |
Qpopper | No | Yes | Yes | Yes | Yes | Yes | Pluggable Authentication Modules,GSSAPI, CRAM-MD5, DIGEST-MD5, APOP, PLAIN, LDAP, CMU SASL library, Kerberos |
qmail | with patch | with vpopmail | Yes | Yes | Yes | Yes | Works with any checkpassword utility. The original supports only LOGIN and PLAIN. Alternate checkpassword utilities support authentication against PAM, LDAP, and databases. |
Sendmail | Yes | Yes | No | Yes | Yes | Yes | Supports all Cyrus SASL authentication methods except for APOP. Also supports X.509 PKI auth via STARTTLS and EXTERNAL. |
SurgeMail | Yes | Yes | Yes | Yes | Yes | Yes | Internal, LDAP, PAM, MYSQL, ODBC, Unix Password, Windows Domain or external protocol |
WinGate | Yes | Yes | Yes | Yes | Yes | No | NT Domain, Active Directory, CRAM-MD5, SASL PLAIN, SASL LOGIN |
Zarafa | Yes | Yes | ? | Yes | Yes | Yes | Internal, Active Directory, any LDAP-compatible source, Unix |
Zimbra | Yes | No | Yes | Yes | Yes | Yes | Internal, LDAP, Open LDAP, Active Directory |
Mail server | SMTP AUTH | POP before SMTP | APOP | Filesystem | Database | LDAP | Other |
Antispam Features
Mail Server | DNSBL | SURBL | Spamtraps | Greylisting | SPF | Tarpit | Bayesian filters | Regular expressions | Embedded Antivirus | Embedded Antispam |
---|---|---|---|---|---|---|---|---|---|---|
agorum core | No | No | No | No | No | No | No | Yes | No | No |
Apache James | ? | ? | ? | ? | ? | ? | Yes | ? | ? | Optional (Apache SpamAssassin) |
Atmail | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes ClamAV | Yes SpamAssassin and Exim ACLs |
Axigen | Yes | Yes[19] | No | Yes | Yes | No | Yes, in SpamAssassin | Yes | Yes Commtouch | Yes SpamAssassin |
Citadel | Yes | Yes | No | No | Optional (via SpamAssassin) | No | Optional (via SpamAssassin) | No | Optional (ClamAV) | Optional (SpamAssassin) |
CommuniGate Pro | Yes | Yes | Yes | No | Yes | Yes | Optional | Yes | Optional (ClamAV) | Optional (via SpamAssassin) |
Courier Mail Server | Yes | ? | Yes | Yes[20] | Yes | Yes | Yes[20] | Yes[20] | Yes Clamav | Yes[20] |
Digital Integration iMail5 | Yes | No | No | Yes | No | No | No | Optional (GWAVA) | Optional (GWAVA) | Proprietary, Optional (GWAVA) |
Dovecot | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
Eudora Internet Mail Server | Yes | ? | Yes | Yes | ? | ? | ? | ? | ? | ? |
Exim | Yes | Yes | Yes | Yes | Yes | Yes | Optional with spamassassin etc. | Yes | Optional any | Optional any |
FirstClass | Yes | Yes | No | ? | Yes | Yes | Yes | Yes | Yes Symantec | ? |
Gordano Messaging Suite | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes Commtouch, Authentium | Yes Commtouch |
GroupWise | Yes | ? | ? | ? | ? | ? | ? | ? | ? | ? |
Hexamail Server | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes BitDefender | Yes |
hMailServer | Yes | Yes | No | Yes | Yes | No | No | Yes | Yes ClamAV | Yes SpamAssassin |
IBM Lotus Domino | Yes[21] | ? | ? | ? | No[22] | ? | ? | ? | ? | ? |
IceWarp Mail Server | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
IndiMail | Yes | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes ClamAV | Yes Bogofilter |
Ipswitch IMail Server | Yes | Yes | No | No | Yes | No | Yes | Yes | Yes Symantec, BitDefender | Yes Commtouch |
JMail | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes ClamAV and/or optional any | Yes and/or built-in |
Kolab | Yes | ? | ? | Yes | Yes | ? | Optional with spamassassin etc. | Yes | Optional (via content filter interface) | Optional (via content filter interface) |
Kerio Connect | Yes | Yes | ? | No | Yes | Yes | Yes | ? | Optional Sophos + optional secondary (dual) | Yes |
MagicMail | Yes | No | Yes | No | ? | ? | No | Yes | Yes | Yes |
Mailismus | No | No | No | Yes | No | Yes | No | No | No | No |
Mailsite | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes |
Mailtraq | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
MDaemon Mail Server | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Optional Kaspersky Lab | Yes |
Mercury Mail Transport System | Yes | ? | ? | Yes (GreyWall extension) | ? | ? | Yes (SpamHalter extension) | ? | Yes (ClamWall extension) | ? |
Microsoft Exchange Server | Yes (2003 & later) | ? | ? | Yes | Yes | Yes (2003 & later) | ? | ? | ? | ? |
Mirapoint | Yes | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes Commtouch, Sophos, F-Secure | Yes Commtouch, Sophos, SPamAssassin |
NetMail | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
Oracle Communications Messaging Server | Yes | Yes | Yes | Yes | Yes | Yes | Optional with spamassassin etc. | Yes | Optional any | Optional any |
Postfix | Yes | ? | ? | Yes | Yes | ? | Optional with spamassassin etc. | Yes | Optional (via content filter interface) | Optional (via content filter interface) |
qmail | ? | ? | ? | Yes | ? | ? | No | ? | No | No |
Sendmail | Yes | Yes (via milter/SA) | ? | Yes | Optional | ? | ? | ? | Yes ClamAV | Yes SpamAssassin |
SparkEngine | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
SurgeMail | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Synovel Collabsuite | Yes | Yes | Yes | Yes | Yes | ? | Yes | Yes | YesClamAV | Yes SpamAssassin |
UW IMAP | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
WinGate | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? |
Zarafa | No[16] | No[16] | No[16] | No[16] | No[16] | No[16] | No[16] | No[16] | No | No |
Zimbra | Yes | ? | ? | ? | ? | ? | ? | ? | Yes ClamAV | Yes SpamAssassin |
Mail Server | DNSBL | SURBL | Spamtraps | Greylisting | SPF | Tarpit | Bayesian filters | Regular expressions | Embedded Antivirus | Embedded Antispam |
See also
- List of mail servers
- [[List of mail archiving]
- Comparison of e-mail clients
Notes and references
- ^ See COPYING file in the distribution
- ^ https://cyrusimap.org/mediawiki/index.php/Downloads#Licensing
- ^ http://git.dbmail.eu/paul/dbmail/tree/README
- ^ a b c Dovecot Operating System Compatibility. Retrieved on 2008-09-03.
- ^ "Dovecot licensing information: COPYING". Retrieved 2008-09-03.
- ^ See NOTICE file in the distribution
- ^ ActiveSync for MDaemon
- ^ http://technet.microsoft.com/en-us/library/cc540463(EXCHG.80).aspx
- ^ http://technet.microsoft.com/en-us/library/ff848256.aspx
- ^ http://technet.microsoft.com/en-us/library/bb629624(EXCHG.80).aspx
- ^ Exchange Installable File System (ExIFS)
- ^ http://www.open-xchange.com/misc/licenses/
- ^ Contains jurisdiction selection and IBM Public License-style indemnification clause.
- ^ http://www.synovel.com/collab/editions
- ^ UW IMAP Server Documentation
- ^ a b c d e f g h i j Zarafa Collaboration Platform architecture diagram. Retrieved on 2011-12-10.
- ^ http://www.zarafa.com/content/scope-and-benefits
- ^ [1]
- ^ via Kaspersky anti-spam add-on
- ^ a b c d with Courier-pythonfilter filtering framework
- ^ http://www-01.ibm.com/support/docview.wss?uid=swg21102611
- ^ http://www-01.ibm.com/support/docview.wss?rs=463&context=SSKTMJ&dc=DB520&uid=swg21227751&loc=en_US&cs=UTF-8&lang=en&rss=ct463lotus