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Comparison of mail servers
By Wikipedia,
the free encyclopedia,
http://en.wikipedia.org/wiki/Comparison_of_mail_servers
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Comparison of mail servers
From Wikipedia, the free encyclopedia
This is a comparison of mail servers: mail transfer agents, mail delivery agents, and other computer software which provide e-mail services.
Feature comparison
Mail server |
Li- nux/ Unix |
Win- dows |
Mac OS X |
SMTP |
POP3 |
IMAP |
SMTP over TLS |
POP over TLS |
NNTP |
SSL |
Web- mail |
Acti- ve Sync |
Data- base |
File sys- tem |
Oth- er |
Licen- se |
info |
Server OS support |
Features |
Storage |
info |
agorum core |
Yes |
Yes |
No |
Yes |
No |
Yes |
No |
No |
No |
Yes |
Yes |
No |
Yes |
No |
No |
Open Sour- ce/ GPLv2 |
Apache James |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
No |
Yes |
Yes |
No |
Open Sour- ce/ ASLv2 |
Atmail |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Propri- etary (Free 5 user) |
Axigen |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
Yes |
Propri- etary |
Citadel |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
Yes |
No |
No |
Open Sour- ce/ GPLv3 |
Com- muni Gate Pro |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
Yes |
No |
Propri- etary |
Courier Mail Server |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
No |
mail- dir |
No |
Open Source |
Cyrus IMAP |
Yes |
No |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
Yes (inde- xes) |
Yes |
Yes |
Open Sour- ce/ BSD |
Dove- cot |
Yes |
No |
Yes |
No |
Yes |
Yes |
No |
Yes |
No |
Yes |
No |
No |
Yes |
mail- dir, mbox, dbox |
No |
Open Sour- ce/ Mixed: MIT and LGPL 2.1 |
Eudora Inter- net Mail Server |
No |
No |
Yes |
Yes |
Yes |
Yes |
No |
No |
No |
No |
No |
No |
No |
No |
Yes |
Propri- etary |
Exim |
Yes |
via Cyg- win |
Yes |
Yes |
No |
No |
Yes |
No |
No |
Yes |
No |
No |
Yes |
Yes |
No |
Open Sour- ce/ GPL |
First- Class |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Propri- etary |
Gorda- no Messa- ging Suite |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Propri- etary |
Group Wise |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
Yes |
Yes |
No |
No |
Propri- etary |
Hexa- mail Server |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
No |
Propri- etary |
hMail- Server |
No |
Yes |
No |
Yes |
Yes |
Yes |
V 5.0 |
V 5.0 |
No |
V 5.0 |
Yes |
No |
Yes |
No |
No |
GNU GPL (V5.0 Propri- etary) |
IBM Lotus Domino |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
No |
Propri- etary |
Indi- Mail |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
No |
No |
Yes |
Yes |
No |
Open Sour- ce/ GPLv3 |
Ips- witch IMail Server |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
No |
Yes |
No |
Propri- etary |
Kerio Con- nect |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Propri- etary |
Mail- Site Fusion |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Propri- etary |
Mail- traq |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Propri- etary |
MDae- mon Mail Server |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
No |
Propri- etary |
Meld- ware Mail Server |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
Yes |
Yes |
No |
Open sour- ce/ LGPL |
Mer- cury Mail Trans- port System |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
No |
Propri- etary/ free- ware |
Micro- soft Ex- change Server |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
ESE only |
Yes (up to 2003 only) |
No |
Propri- etary |
Mira- point |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Propri- etary |
Net- Mail |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
Yes |
No |
No |
Propri- etary |
Open- Xchan- ge |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
Yes |
Yes |
No |
No |
Dual licen- se (GPL) |
Oracle Com- muni- cations Messa- ging Ex- change Server |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
No |
Propri- etary |
Postfix |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
No |
No |
Yes |
No |
No |
Yes |
Yes |
Yes |
Open sour- ce/ IBM Public Licen- se |
qmail |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
No |
? |
No |
No |
No |
No |
Yes |
No |
Public domain |
Qpop- per |
Yes |
Yes |
Yes |
No |
Yes |
No |
No |
Yes |
No |
Yes |
No |
No |
No |
Yes |
Yes |
BSD- style |
Send- mail |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
No |
No |
No |
No |
No |
? |
Yes |
? |
Open source/ Send- mail Licen- se |
Spark Engine |
Yes |
Yes |
Yes |
Yes |
No |
No |
Yes |
No |
No |
Yes |
No |
No |
Yes |
Yes |
Yes |
Propri- etary |
Surge- Mail |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Propri- etary (Free 5 user) |
Syno- vel Collab- suite |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
Yes |
Yes |
? |
Open Sour- ce/ Propri- etary |
UW IMAP |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
No |
Yes |
Web- Pine |
No |
No |
Yes |
No |
Open Sour- ce/ Apa- che licen- se |
Win- Gate |
No |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
No |
No |
Yes |
No |
Propri- etary |
Zarafa |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Open Sour- ce/ Propri- etary |
Zim- bra |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Open Sour- ce/ Propri- etary |
info |
Server OS support |
Features |
Storage |
info |
Mail server |
Li- nux/ Unix |
Win- dows |
Mac OS X |
SMTP |
POP3 |
IMAP |
SMTP over TLS |
POP over TLS |
NNTP |
SSL |
Web- mail |
Acti- ve Sync |
Data base |
File sys- tem |
Oth- er |
Licen- se |
Authentication
Mail server |
SMTP AUTH |
POP before SMTP |
APOP |
File-system |
Database |
LDAP |
Other |
agorum core |
Yes |
No |
No |
No |
Yes |
Yes |
PLAIN, LOGIN,
CRAM-MD5, NTLM |
Apache James |
Yes |
? |
? |
? |
Yes |
Yes |
? |
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 |
No |
Yes |
CLRTXT, CRAM-MD5,
DIGEST-MD5,
APOP, GSSAPI,
NTLM, MSN,
SESSIONID, External
Authentication Plug-in |
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 |
No |
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 |
Dovecot |
No |
No |
Yes |
Yes |
Yes |
Yes |
Not an SMTP
server, but offers
SASL to MTAs.
http://wiki.dovecot.org
/DovecotFeatures http://wiki.dovecot.org
/Authentication |
Eudora Internet Mail Server |
Yes |
No |
Yes |
Yes |
No |
No |
CRAM-MD5, DIGEST-MD5, PLAIN, LOGIN |
Exim |
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 |
IndiMail |
Yes |
Yes |
No |
Yes |
Yes |
No |
CLRTXT, PLAIN, LOGIN, CRAM-MD5, APOP, Checkpassword, authvchkpw |
Ipswitch IMail Server |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Active Directory, Windows authentication, CRAM-MD5, PLAIN, LOGIN |
Kerio Connect |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Active Directory, Apple Open Directory, ActiveSync, Pluggable
Authentication Modules |
MailSite Fusion |
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 |
Meldware Mail Server |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
? |
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 |
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 Exchange Server |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Plain, Login, CRAM-MD5, Digest-MD5, Certificate |
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 |
? |
? |
? |
? |
? |
? |
? |
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 |
Antispam Features
Mail
Server |
DNSBL |
SURBL |
Spam
traps |
Grey
listing |
SPF |
Tarpit |
Bayesian
filters |
Regular expres-sions |
Embedded Antivirus |
Embed-
ded Anti-
spam |
agorum
core |
No |
No |
No |
No |
No |
No |
No |
Yes |
No |
No |
Apache
James |
? |
? |
? |
? |
? |
? |
Yes |
? |
? |
? |
Atmail |
Yes |
Yes |
No |
Yes |
Yes |
No |
Yes |
Yes |
Yes
ClamAV |
? |
Axigen |
Yes |
No |
No |
Yes |
Yes |
No |
Yes, in Spam- Assassin |
Yes |
Yes Com- mtouch |
Yes
Spam- Ass- assin |
Citadel |
Yes |
Yes |
No |
No |
Opt-
ional
(via
Spam
Ass- assin) |
No |
Optional (via Spam
Assassin) |
No |
Optional (ClamAV) |
Opti-
onal (Spam- Ass-
assin) |
Communi
Gate Pro |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Optional |
Yes |
Optional |
Optional |
Courier
Mail Server |
Yes |
? |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes Clamav |
Yes |
Dovecot |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Eudora
Internet Mail
Server |
Yes |
? |
Yes |
Yes |
? |
? |
? |
? |
? |
? |
Exim |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Optional with spam-
assasin 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 Com- mtouch, Authentium |
Yes
Comm-touch |
Group
Wise |
Yes |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Hexamail
Server |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes Avast |
? |
hMail- Server |
Yes |
Yes |
No |
Yes |
Yes |
No |
No |
Yes |
Yes ClamAV |
Yes Spam- Ass- assin |
IBM Lotus Domino |
Yes< |
? |
? |
? |
No |
? |
? |
? |
? |
? |
IndiMail |
Yes |
No |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes
ClamAV |
Yes
Bogo-
filter |
Ipswitch
IMail Server |
Yes |
Yes |
No |
No |
Yes |
No |
Yes |
Yes |
Yes Symantec, BitDefender |
Yes
Com-
mtouch |
Kerio
Connect |
Yes |
Yes |
? |
No |
Yes |
Yes |
Yes |
? |
Optional McAfee + optional secondary (dual) |
Yes |
MailSite
Fusion |
Yes |
Yes |
Yes |
Yes |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Mailtraq |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
MDaemon
Mail
Server |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Optional Kaspersky Labs |
Yes |
Meldware
Mail
Server |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Mercury Mail Transport System |
Yes |
? |
? |
Yes
|
? |
? |
Yes (Spam- Halter exten- sion) |
? |
Yes (ClamWall extension) |
? |
Microsoft Exchange
Server |
Yes (2003 & later) |
? |
? |
Yes |
Yes |
Yes (2007 & later) |
? |
? |
? |
? |
Mirapoint |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes Commtouch, Sophos, F-Secure |
Yes
Comm- touch, Sophos, SPam- Ass- assin |
NetMail |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Oracle Communi-
cations Messa-
ging Exchange
Server |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Optional with spam-
assasin etc. |
Yes |
Optional any |
Optional any |
Postfix |
Yes |
? |
? |
Yes |
Yes |
? |
Opti-
onal
with
spam ass-
asin etc. |
Yes |
Optional (via content filter interface) |
Opti-
onal (via content filter inter-face) |
qmail |
? |
? |
? |
Yes |
? |
? |
No |
? |
No |
No |
Sendmail |
? |
? |
? |
Yes |
? |
? |
? |
? |
? |
? |
Spark Engine |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
SurgeMail |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Synovel Collab- suite |
Yes |
Yes |
Yes |
Yes |
Yes |
? |
Yes |
Yes |
YesClamAV |
Yes Spam- Ass-
assin |
UW IMAP |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
WinGate |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Zarafa |
? |
? |
? |
? |
? |
? |
? |
? |
? |
? |
Zimbra |
Yes |
? |
? |
? |
? |
? |
? |
? |
Yes ClamAV |
Yes Spam- Ass-
assin |
Mail Server |
DNSBL |
SURBL |
Spam
traps |
Grey
listing |
SPF |
Tarpit |
Bayesian
filters |
Regular expres-
sions |
Embedded Antivirus |
Embed- ded Anti
spam |
Published - November 2010
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