Comparison of email clients

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The following tables compare general and technical features of a number of email client programs. Please see the individual products' articles for further information.

General

Basic general information about the clients: creator/company, O/S, licence, & interface. Clients listed on a light purple background are no longer in active development.

Client Author/Developer Operating system Software license User Interface
AfterLogic WebMail Lite afterlogic.org Cross-platform Affero General Public License Webmail
Alpine University of Washington Cross-platform Apache License 2.0 TUI
@Mail Atmail.com Linux Proprietary, source code available webmail
Balsa Stuart Parmenter Linux GNU General Public License GUI (GTK+)
Becky! Internet Mail Rimarts Windows Proprietary GUI
BlitzMail Dartmouth College BSD licenses GUI
Citadel citadel.org Unix-like GNU General Public License Webmail
Claws Mail the Claws Mail team Cross-platform GNU General Public License GUI (GTK+)
Clyton Gammadyne Corporation [Note 1]:{{{3}}} Windows Proprietary GUI
Cone Courier Mail Server developers Unix-like GNU General Public License TUI
Courier (formerly Calypso) Micro Computer Systems, Inc., continued by Rose City Software Windows Proprietary GUI
Elm Dave D. Taylor, Sydney Weinstein, Bill Pemberton, Michael Elkins, Kari Hurtta Unix-like Elm Mail System GPL TUI
eM Client eM Client Inc. Windows Proprietary GUI
EmailTray Internet Promotion Agency S.A. Windows, Android Proprietary GUI
Eudora OSE Qualcomm Windows, OS X Free GUI
Eureka Email Sean O'Connor Windows Proprietary GUI
Evolution The GNOME Project Unix-like GNU General Public License GUI (GTK+)
FirstClass Open Text Proprietary GUI
Forté Agent Mark Sidell Windows Proprietary GUI
Geary Yorba Foundation Unix-like GNU LGPL v2.1 GUI (GTK+)
GNUMail Ludovic Marcotte and others Unix-like, OS X GNU General Public License GUI
Gnus Gnus team Cross-platform GNU General Public License TUI and GUI
GroupWise Novell Cross-platform Proprietary GUI
i.Scribe, InScribe Memecode Windows, OS X, Linux Proprietary GUI
IBM Notes (formerly IBM Lotus Notes) IBM Collaboration Solutions (formerly Lotus Software), IBM Windows, OS X, Linux Proprietary GUI (Notes), Web (iNotes) and Mobile (Traveler)
IMP Horde LLC Cross-platform GNU General Public License Webmail
Inky Dave Baggett, Arcode Corporation Windows, OS X, Proprietary GUI
KMail KDE Cross-platform GNU General Public License GUI (Qt)
Libremail Bernard Chardonneau Linux, UNIX, Unix-like Free licence written by the author TUI and shells
Mail (OS X) Apple Inc. Mac OS X and iOS Proprietary GUI
Mailbird Mailbird Windows Proprietary GUI
Mailpile Mailpile Linux, Windows, OS X Affero General Public License and Apache License 2.0 webmail
mailx ? Unix-like BSD Licenses TUI
Microsoft Entourage Microsoft Mac OS X Proprietary GUI
Microsoft Outlook Microsoft Windows, Mac OS X Proprietary GUI
Mozilla Mail & Newsgroups Mozilla Foundation Mozilla Public License GUI (XUL)
Mozilla Thunderbird Mozilla Foundation Cross-platform Mozilla Public License GUI (XUL)
Mulberry Cyrus Daboo (formerly Cyrusoft International, Inc./ISAMET) Cross-platform Apache License 2.0 GUI
Mutt Michael Elkins Cross-platform GNU General Public License TUI (ncurses)
Netscape Messenger Netscape Communications  ? GUI
Netscape Messenger 9 Netscape Communications Mozilla Public License GUI
nmh / MH RAND Corporation Unix-like BSD Licenses CLI
Opera Mail Opera Software Cross-platform Proprietary GUI
Outlook Express Microsoft Windows Proprietary GUI
Pegasus Mail David Harris Windows Proprietary GUI
Pine University of Washington Cross-platform Pine License TUI
Pocomail Poco Systems Windows Proprietary GUI
Pop Peeper Esumsoft Cross-platform Proprietary GUI
RoundCube The RoundCube Team Cross-platform GNU General Public License Webmail
SeaMonkey Mail & Newsgroups SeaMonkey Council Cross-platform Mozilla Public License GUI (XUL)
Spicebird Synovel Windows, Linux, BSD Mozilla Public License GUI (XUL)
SquirrelMail The SquirrelMail Project Team Cross-platform GNU General Public License Webmail
Sylpheed Hiroyuki Yamamoto Cross-platform GNU General Public License GUI (GTK+)
The Bat! RitLabs Windows Proprietary GUI
Trojitá KDE Cross-platform GNU General Public License GUI (Qt)
Turnpike Thus PLC (Demon Internet) Windows Proprietary GUI
Windows Live Mail Microsoft Windows Proprietary GUI
Windows Mail Microsoft Windows Proprietary GUI
WorldClient Alt-N Technologies Windows Proprietary GUI
YAM YAM Open Source Team and contributing authors AmigaOS GNU General Public License GUI
Zimbra Zimbra Cross-platform Mozilla Public License for server and ZPL for client GUI
Client Author/Developer Operating system Software license User interface

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Release history

A brief digest of the release histories.

Client First public Date First public Version First stable Date First stable Version Latest stable release
Alpine 2006-11 0.8 2007 December 1.00 2015-01-18, 2.20 (January 18, 2015; 10 years ago (2015-01-18)) [±]
Atmail 2001-01-30 0.8 2012-01-12 6.3.5 2014-07-14, 7.4 (July 14, 2014; 10 years ago (2014-07-14)) [±]
Becky! Internet Mail 1996 1 ? ? 2015-09-30, 2.72 (September 30, 2015; 9 years ago (2015-09-30) [1]) [±]
Citadel 1987 ? 1988 1.00 2015-04-01, 9.01 (April 1, 2015; 9 years ago (2015-04-01)) [±]
Claws Mail 2001-05 0.4.67 2005-01 1.0.0 2015-07-19, 3.13.1 (December 20, 2015; 9 years ago (2015-12-20)) [±]
Clyton 2007-10 1.0 2007-10 1.0 2015-07-24, v12.0
Cone 2003-05 0.50 2003-05 0.50 2015-04-25, 0.92 (April 25, 2015; 9 years ago (2015-04-25)) [±]
Courier 2004-06 3.5 discontinued discontinued 2004-06, 3.5
Elm 1986 ? 1987-03 2 2005-08-18, 2.5.8 (August 18, 2005; 19 years ago (2005-08-18)) [±]
eM Client 2007-11 1.0 2007-11 1.0 2015-04-23, 6.0.24928.0 (February 29, 2016; 9 years ago (2016-02-29)) [±]
EmailTray 2010-10 2.0 2011-03 3.11 2012-07-02, 4.0 (July 2, 2012; 12 years ago (2012-07-02)) [±]
Eudora 1988[2] ? 1988[2] ? 2006-10-11, 7.1 (Windows), 6.2.4 (Mac OS) (October 11, 2006; 18 years ago (2006-10-11)) [±]
Eureka Email 2002-11 1.0 2002-11 1.0 2005-03-01, 2.2 (March 1, 2005; 20 years ago (2005-03-01)) [±]
Evolution 2000-05-11 0.0 2001-12-03 1.0 2015-09-23, 3.18 (September 23, 2015; 9 years ago (2015-09-23)[3]) [±]
Forté Agent ? ? ? ? 2014-10-20, 8 (October 20, 2014; 10 years ago (2014-10-20)) [±]
Geary 2012 0.1 2012 0.1 2015-03-30, 0.10 (March 30, 2015; 9 years ago (2015-03-30)[4]) [±]
Gnus 1987[5] ? 1988-02-01[5] 2.0 2015-09-18,
GroupWise ? ? 1986 1.0 2014-04-02, GroupWise 2014
(April 2, 2014; 10 years ago (2014-04-02)) [±]
i.Scribe / InScribe 1999 1.00 ? ? 2014-02-04 Template:Latest stable software release/Scribe Mail
IBM Lotus Notes 1989 1.0 1989 1.0 2013-03-14, 9.0 (March 14, 2013; 11 years ago (2013-03-14)) [±]
IMP ? ? 1998 1.0 2012-03-21, H4 (5.0.23) (July 21, 2012; 12 years ago (2012-07-21)) [±]
KMail 1998-10 Alpha 1999-02 1.0.17 2014-11-11, 4.14.3 (November 11, 2014; 10 years ago (2014-11-11)) [±][6]
Libremail 2003-05-27 1.0 2014-10-13 2.4.1 2014-05-13, 2.4 (May 13, 2014; 10 years ago (2014-05-13)) [±]
Mail (OS X) 2000-09-13 Public Beta 2001-03-24 1.0 2014-10-16, 8.0 (October 16, 2014; 10 years ago (2014-10-16)) [±]
Mailbird 2013-04-01 Public Beta ? ? 2015-09-10,
Microsoft Entourage ? ? ? ? 2013-03-12, 2008 (12.3.6) (March 12, 2013; 11 years ago (2013-03-12)) [±]
Microsoft Office Outlook 1997 97 1997 97 2010-06-15, 16.0.4266.1003 (September 22, 2015; 9 years ago (2015-09-22)) [±]
Mozilla Thunderbird 2003-07-28 0.1 2004-12-07 1.0 2015-09-29, 38.5.1 (January 7, 2016; 9 years ago (2016-01-07)[7]) [±]
Mulberry 1996-09-20 1.0 1996-09-20 1.0 2007-02-21, 4.0.8 (February 21, 2007; 18 years ago (2007-02-21)) [±]
Mutt 1995 ? ? ? 2007-06-09, 1.6.0 (April 4, 2016; 8 years ago (2016-04-04)) [±]
Netscape Messenger ? ? ? ? 2004-06-17, 7.2
Netscape Messenger 9 2007-11-15 9.0a1 discontinued discontinued 2007-11-15
nmh / MH 1979 ? ? ? 2012-06-11, 1.5 (June 11, 2012; 12 years ago (2012-06-11)) [±]
Opera Mail 1996-09 2.1b1 1996-12 2.1 2013-06-11, 1.0.1044[8] (February 16, 2016; 9 years ago (2016-02-16)) [±]
Outlook Express 1996 3.0 ? ? 2004-08-25, 6.0 SP2 (August 25, 2004; 20 years ago (2004-08-25)) [±]
Pegasus Mail 1990 ? 1990 ? 2014-03-08, 4.72 (April 21, 2016; 8 years ago (2016-04-21)[9]) [±]
Pine 1992-01-15 2.00 1992-01-15 2.00 2005-09-28, 4.64 (September 28, 2005; 19 years ago (2005-09-28)) [±]
Pocomail 1999 ? ? ? 2009-04-06, 4.8 build 4400 discontinued (April 6, 2009; 15 years ago (2009-04-06)) [±]
Pop Peeper ? ? ? ? 4.1,
RoundCube 2006 0.1-rc1 2014-04-07 1.0.0 2015-09-14,
SeaMonkey Mail & Newsgroups 2005-09-15 1.0a 2006-01-30 1.0 2015-09-26, 2.39 (November 8, 2015; 9 years ago (2015-11-08)[10]) [±]
SquirrelMail 1999-12 0.1 2001-01 1.0 2011-07-12, 1.4.22 (12 July 2011; 13 years ago (2011-07-12)) [±]
Sylpheed 2000-01 0.1.0 2004-12 1.0.0 2015-07-06, 3.4.3 (July 6, 2015; 9 years ago (2015-07-06)) [±]
The Bat! 1997-03 1.0 Beta 1998-03 1.00 Build 1310 2015-08-05, 7.1.16 (February 18, 2016; 9 years ago (2016-02-18)) [±]
Trojitá 2009-08 0.1 2012-12 0.3.90 2015-02-23, 0.6 (January 24, 2016; 9 years ago (2016-01-24)[11]) [±]
Turnpike 1996 (circa) 1.0 1996 (circa) 1.0 2006-05-26, 6.06 (May 23, 2006; 18 years ago (2006-05-23)) [±]
Windows Live Mail 2007-11-06 12 2007-11-06 12 2014-11-04, 2012 (v16.4.3528.0331) (November 4, 2014; 10 years ago (2014-11-04)) [±]
Windows Mail ? ? ? ? 2007-01-01,
YAM 1995 1.0 1995 1.0 2014-04-18, 2.9p1 (April 18, 2014; 10 years ago (2014-04-18)) [±]
Zimbra 2005-11 Beta 2006-03 3.5 2012-04-10, 7.2.0 (April 10, 2012; 12 years ago (2012-04-10)) [±]

Operating system support

The operating systems on which the clients can run natively (without emulation).

Client Microsoft Windows Mac OS X Linux BSD Unix DOS Other
Alpine Yes Yes Yes Yes Yes No No
Atmail No No Yes Yes Yes No No
Balsa No No Yes Yes No No No
Becky! Internet Mail Yes No No No No No No
Citadel No Yes Yes Yes Yes No No
Claws Mail Yes Yes Yes Yes Yes No No
Clyton Yes (NT) No No No No No No
Cone No Yes Yes Yes Yes No No
Courier Yes No No No No No No
Elm No Yes Yes Yes Yes No No
eM Client Yes No No No No No No
EmailTray Yes No No No No No No
Eudora Yes Yes No No No No No
Eureka Email Yes No No No No No No
Evolution Beta No Yes Yes Yes No No
Forté Agent Yes No No No No No No
Geary No No Yes Yes Yes No No
Gnus Yes Yes Yes Yes Yes Yes Emacs
GroupWise Yes Yes Yes Yes No No No
i.Scribe / InScribe Yes Yes Yes No No No No
IBM Lotus Notes Yes Yes Yes No Yes No No
IMP Yes Yes Yes Yes Yes No No
KMail No Yes Yes Yes Yes No No
Libremail No [Note 2]:{{{3}}} Should work [Note 3]:{{{3}}} Yes Yes Yes No [Note 2]:{{{3}}} No
Mail (OS X) No Included No No No No iOS
Mailbird Yes No No No No No No
mailx No No Yes Yes Yes No No
Microsoft Entourage No Terminated (2008) No No No No No
Microsoft Office Outlook Yes Yes No No No No No
Mozilla Mail & Newsgroups Terminated (1.7.13) No No
Mozilla Thunderbird Yes Yes Yes Yes Yes No No
Mulberry Yes Yes Yes Yes Yes No No
Mutt Yes Yes Yes Yes Yes Yes[12] No
Netscape Messenger Terminated (4.80) No No
Netscape Messenger 9 Terminated (9.0a1) No No
nmh / MH No Yes Yes Yes Yes No No
Opera Mail Yes Yes Yes Yes ? No No
Outlook Express Included (up to XP) No No No No No No
Pegasus Mail Yes No No No No Yes No
Pine Yes Yes Yes Yes Yes Terminated (3.96)[13] No
Pocomail Yes No No No No No No
Pop Peeper Yes ? ? ? ? No No
RoundCube Yes Yes Yes Yes Yes No No
SeaMonkey Mail & Newsgroups Yes Yes Yes Yes Yes No No
Spicebird Yes planned Yes Yes No No No
SquirrelMail Yes Yes Yes Yes Yes No No
Sylpheed Yes Yes Yes Yes Yes No No
The Bat! Yes No No No No No No
Trojitá Yes Yes Yes Yes Yes No MeeGo
Turnpike Yes No No No No No No
Windows Live Mail Yes No No No No No No
Windows Mail Included (Vista) No No No No No No
YAM No No No No No No AmigaOS
Zimbra Yes Yes Yes Yes Yes No No
Client Microsoft Windows Mac OS X Linux BSD Unix DOS Other

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Protocol support

Communication and access protocol support

What email and related protocols and standards are supported by each client.

Client POP3
fetch all messages		 POP3
selected by filter		 POP3
selected by user		 IMAP4
 SMTP
 NNTP
 LDAP v2
 LDAP v3
 EWS IPv6 MAPI
Alpine Yes Yes Yes Yes Yes Yes Yes Yes ? Yes ?
Atmail No No No Yes Yes No Yes Yes Yes Yes Yes
Becky! Internet Mail Yes Yes Yes Yes Yes Yes [Note 4]:{{{3}}} Yes ? ? ? ?
Citadel Yes ? ? Yes Yes ? ? ? ? ? ?
Claws Mail Yes Yes Yes Yes Yes Yes Yes Yes ? Yes ?
Clyton Yes No No Yes Yes No No No No ? Yes
Cone Yes No No [Note 5]:{{{3}}} Yes Yes Yes Yes Yes ? ? ?
Courier Yes Yes Yes Yes Yes No Yes Yes ? ? ?
Elm No No No ? ? ? ? ? ? ? ?
eM Client Yes No No Yes Yes No No No Yes No No
EmailTray Yes No No Yes Yes No No No No No No
Eureka Email ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes No Yes Yes Yes Yes Yes Yes plug-in ? plug-in
Gnus Yes Yes No Yes Yes Yes Yes Yes ? ? ?
GroupWise Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes
i.Scribe / InScribe Yes No Yes Yes Yes No Yes [Note 6]:{{{3}}} Yes [Note 6]:{{{3}}} No No Yes
IBM Notes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No
KMail Yes Yes Yes Yes Yes No [Note 7]:{{{3}}} Yes ? ? ? ?
Libremail Yes Yes Yes No Yes No No No No ? No
Mail (OS X) Yes No No Yes Yes No Yes ? Yes ? Yes
Mailbird Yes ? ? Yes Yes ? Yes Yes ? Yes ?
Microsoft Entourage Yes ? ? Yes Yes Yes No Yes Partial ? ?
Microsoft Entourage 2008, Web Services Edition Yes ? ? Yes Yes ? ? Yes Yes ? ?
Microsoft Office Outlook Yes No No Yes Yes No Yes ? Yes Yes Yes
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes No No Yes Yes Yes Partial Partial[16] extensible[17] Yes ?
Mulberry Yes No No Yes Yes No Yes ? ? Yes Yes
Mutt Yes No (possible with POP3 browser) No (possible with POP3 browser) Yes Yes No (slrn looks alike) Partial (resolve real names through NSS) ? ? Yes ?
Netscape Messenger Yes ? ? Yes ? Yes ? ? ? ? ?
Netscape Messenger 9 Yes ? ? Yes ? Yes ? ? ? ? ?
nmh / MH Yes ? ? No Yes ? ? ? No ? No
Opera Mail Yes No Yes Yes Yes Yes No No ? Yes Yes
Outlook Express Yes No No Yes Yes Yes Yes ? No ? No
Pegasus Mail Yes Yes Yes Yes Yes Yes [Note 8]:{{{3}}} Yes ? ? ? ?
Pine Yes No No Yes Yes Yes Yes No ? ? ?
Pocomail Yes Yes Yes Yes Yes No No No ? ? ?
Pop Peeper Yes No No Yes Yes ? ? ? No Yes No
RoundCube Yes No No Yes Yes No Yes Yes ? ? ?
SeaMonkey Mail & Newsgroups Yes No No Yes Yes Yes Partial ? ? Yes ?
Spicebird Yes No No Yes Yes Yes Partial ? ? ? ?
SquirrelMail Yes No No Yes Yes No Yes Yes ? ? ?
Sylpheed Yes Yes Yes Yes Yes Yes Yes No No Yes No
The Bat! Yes Yes [Note 9]:{{{3}}} Yes [Note 10]:{{{3}}} Yes Yes Yes [Note 11]:{{{3}}} Yes No Yes Yes Yes
Trojitá No No No Yes Yes No No No No Yes No
Turnpike Yes ? ? ? Yes Yes ? ? ? ? ?
Windows Live Mail Yes No No Yes Yes Yes Yes ? No Yes No
Windows Mail Yes No No Yes Yes ? ? ? No Yes No
YAM Yes Yes Yes No Yes No No No ? ? ?
Zimbra Yes No No Yes Yes No Yes Yes ? ? ?
Client POP3
fetch all messages		 POP3
selected by filter		 POP3
selected by user		 IMAP4 SMTP NNTP LDAP v2 LDAP v3 EWS IPv6 MAPI
Client IMSP
 ACAP
 RSS 0.91 Feeds RSS 1.0 Feeds RSS 2.0 Feeds ATOM Feeds iCalendar MAPI/RPC CalDAV CardDAV
Alpine ? ? ? ? ? ? ? ? ? ?
Atmail Yes Yes No No No No Yes Yes Yes Yes
Becky! Internet Mail ? ? Yes [Note 12]:{{{3}}} Yes [Note 12]:{{{3}}} Yes [Note 12]:{{{3}}} Yes [Note 12]:{{{3}}} ? ? ? ?
Citadel ? ? ? ? ? ? ? ? ? ?
Claws Mail ? ? No Yes [Note 13]:{{{3}}} Yes [Note 13]:{{{3}}} Yes [Note 13]:{{{3}}} Yes [Note 14]:{{{3}}} ? ? ?
Clyton No No No No No No No Yes No No
Cone No No No No No No No ? ? ?
Courier No No No No No No No ? ? ?
Elm ? ? ? ? ? ? ? ? ? ?
eM Client No No Yes Yes Yes No Yes No Yes Yes
EmailTray No No No No No No No No ? ?
Eudora No Yes No No No No No ? ? ?
Eureka Email ? ? ? ? ? ? ? ? ? ?
Evolution No No No [Note 15]:{{{3}}} No [Note 15]:{{{3}}} No [Note 15]:{{{3}}} No Yes Yes Yes Yes
Gnus ? ? Yes Yes Yes No ? ? ? ?
GroupWise ? No ? ? ? ? Yes ? ? ?
i.Scribe / InScribe No No No No No No No Yes ? ?
IBM Lotus Notes No No Yes [Note 16]:{{{3}}} Yes Yes Yes Yes ? ? ?
KMail ? ? Yes [Note 17]:{{{3}}} Yes [Note 17]:{{{3}}} Yes [Note 17]:{{{3}}} Yes [Note 17]:{{{3}}} Yes [Note 18]:{{{3}}} ? Yes Yes
Libremail No No No No No No No ? No No
Mail (OS X) ? ? Yes Yes Yes Yes Yes [Note 19]:{{{3}}} ? Yes Yes
Microsoft Entourage ? ? ? ? ? ? Yes ? ? ?
Microsoft Office Outlook ? ? Yes [Note 20]:{{{3}}} Yes [Note 20]:{{{3}}} Yes [Note 20]:{{{3}}} Yes [Note 20]:{{{3}}} Yes [Note 21]:{{{3}}} Yes No No
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird No No Yes Yes Yes Yes Yes [Note 22]:{{{3}}} Yes [Note 23]:{{{3}}} ? ?
Mulberry Yes Yes No No No No Yes ? Yes ?
Mutt ? ? No No No No No ? ? ?
Netscape Messenger ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ?
Opera Mail ? ? Yes Yes Yes Yes No ? No No
Outlook Express ? ? No No No No No ? No No
Pegasus Mail ? ? Yes [Note 8]:{{{3}}} Yes [Note 8]:{{{3}}} Yes [Note 8]:{{{3}}} ? ? ? ? ?
Pine No No No No No No No ? ? ?
Pocomail No No Yes Yes Yes No No ? ? ?
Pop Peeper ? ? Yes Yes Yes Yes No ? ? ?
SeaMonkey Mail & Newsgroups No No Yes Yes Yes Yes Yes [Note 22]:{{{3}}} ? ? ?
Spicebird No No Yes Yes Yes Yes Yes [Note 22]:{{{3}}} No ? ?
SquirrelMail ? ? Yes Yes Yes Yes Yes Yes ? ?
Sylpheed No No No No No No No No ? ?
The Bat! No No Yes [Note 24]:{{{3}}} Yes [Note 24]:{{{3}}} Yes [Note 24]:{{{3}}} Yes [Note 24]:{{{3}}} No Yes ? Yes
Trojitá No No No No No No No No ? ?
Turnpike ? ? ? ? ? ? ? ? ? ?
Windows Live Mail ? ? Yes Yes Yes Yes No ? ? ?
Windows Mail ? ? ? ? ? ? ? ? ? ?
YAM No No No No No No No ? ? ?
Zimbra ? ? Yes Yes Yes Yes Yes ? ? ?
Client IMSP ACAP RSS 0.91 Feeds RSS 1.0 Feeds RSS 2.0 Feeds ATOM Feeds iCalendar MAPI/RPC CalDAV CardDAV

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Authentication support

Client Regular MSN (NTLM)

browser login

 Compuserve

(RPA)

 MD5 APOP [Note 25]:{{{3}}} CRAM-HMAC [Note 26]:{{{3}}} DIGEST-MD5 with hardware token

PKCS#11

 Biometric SMTP Auth [Note 27]:{{{3}}} SSL/TLS Client Certificate OAUTH
LOGIN PLAIN MD5 SHA1 RIPEMD
Alpine Yes Yes No No No Yes No No No No No Yes No ?
Atmail Yes Yes Yes No Yes Yes Yes Yes Yes Yes No Yes Yes ?
Becky! Internet Mail Yes Yes Yes ? Yes Yes ? ? ? ? ? Yes Yes ?
Citadel ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Claws Mail Yes Yes ? ? Yes Yes ? ? Yes Yes [Note 28]:{{{3}}} ? Yes Yes ?
Clyton Yes Yes Yes [Note 29]:{{{3}}} No No Yes No No No No No Yes Yes No
Cone Yes Yes No No No Yes Yes No No No No Yes Yes ?
Courier Yes Yes Yes No Yes Yes Yes No Yes No No Yes Yes ?
Elm ? ? ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Yes Yes Yes No No Yes No No Yes No No Yes No ?
EmailTray Yes Yes ? ? Yes Yes Yes No ? No No Yes No ?
Eudora Yes Yes Yes Yes Yes Yes No No No No No No ? ?
Eureka Email ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes Yes Yes No Yes Yes No No Yes No No Yes Yes ?
Gnus Yes Yes ? ? Yes Yes Yes ? Yes ? ? Yes ? ?
GroupWise ? ? ? ? ? ? ? ? ? ? ? ? ? ?
i.Scribe / InScribe Yes Yes Yes No Yes No No No No No No Yes No ?
IBM Lotus Notes Yes ? Yes No No No ? ? ? Yes No Yes ? ?
KMail Yes Yes Yes No Yes Yes No No Yes No No Yes Yes ?
Libremail Yes ? No No No No No No No No No Yes No ?
Mail (OS X) Yes Yes Yes [Note 30]:{{{3}}} No Yes Yes [Note 31]:{{{3}}} ? ? ? ? ? Yes ? ?
Microsoft Entourage Yes No Yes ? ? Yes ? ? ? Yes ? Yes Yes ?
Microsoft Office Outlook Yes No Yes No No No No No No No No Yes No ?
Mozilla Mail & Newsgroups Yes ? ? Yes ? Yes ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes Yes No Yes Yes No No No [1] Yes No Yes Yes ?
Mulberry Yes Yes Yes No No Yes No No Yes No No Yes Yes ?
Mutt Yes Yes Yes ? Yes Yes No No Yes No No 1.5.15 Yes ?
Netscape Messenger ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Opera Mail Yes Yes No No Yes Yes No ? ? No No Yes Yes ?
Outlook Express Yes No Yes No No No No No No No No Yes No ?
Pegasus Mail Yes ? No No Yes No No No No No No Yes Yes ?
Pine Yes Yes No No No Yes No No No No No Yes No ?
Pocomail ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Pop Peeper Yes Yes ? ? ? ? ? ? ? ? ? ? Yes ?
RoundCube Yes Yes ? ? Yes Yes Yes ? Yes Yes ? Yes ? ?
SeaMonkey Mail & Newsgroups Yes Yes Yes No Yes Yes No No No [2] Yes No Yes Yes ?
SquirrelMail Yes Yes ? ? Yes Yes Yes ? Yes Yes ? Yes ? ?
Sylpheed Yes Yes No No Yes Yes No No No No No Yes No ?
The Bat! Yes Yes Yes Yes Yes Yes No No No Yes [Note 32]:{{{3}}} Yes [Note 32]:{{{3}}} Yes No Yes
Trojitá Yes No No No No No No No No No No Yes No ?
Turnpike ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Windows Live Mail Yes No Yes No Yes No No No No No No No No ?
Windows Mail ? ? ? ? ? ? ? ? ? ? ? ? ? ?
YAM Yes Yes ? ? Yes ? ? ? ? ? ? ? AmiSSL ?
Zimbra Yes Yes ? ? Yes Yes ? ? ? Yes ? Yes [Note 33]:{{{3}}} ? ?
Client Regular MSN (NTLM)

browser login

 Compuserve

(RPA)

 MD5 APOP [Note 25]:{{{3}}} CRAM-HMAC [Note 26]:{{{3}}} DIGEST-MD5 with hardware token

PKCS#11

 Biometric SMTP Auth [Note 27]:{{{3}}} SSL/TLS Client Certificate OAUTH
LOGIN PLAIN MD5 SHA1 RIPEMD

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SSL and TLS support

Client Secure POP3 Secure IMAP4 Secure SMTP Secure NNTP Secure LDAP OCSP [Note 34]:{{{3}}} CRL [Note 35]:{{{3}}}
SSL TLS [Note 36]:{{{3}}} SSL TLS [Note 36]:{{{3}}} SSL TLS [Note 37]:{{{3}}} SSL TLS SSL TLS
Alpine Yes Yes Yes Yes Yes Yes Yes Yes ? Yes ? ?
Atmail No No Yes Yes Yes Yes No No Yes Yes ? ?
Becky! Internet Mail Yes Yes Yes Yes Yes Yes ? ? ? ? ? ?
Citadel ? ? ? ? ? ? ? ? ? ? ? ?
Claws Mail Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes ? Yes
Clyton Yes Yes Yes Yes Yes Yes No No No No ? Yes
Cone Yes Yes Yes Yes Yes Yes No No Yes Yes No No
Courier No No No No No No No No No No No No
Elm ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Yes Yes Yes Yes Yes Yes No No No No No Yes
EmailTray Yes Yes Yes Yes Yes Yes No No No No No No
Eudora Yes Yes Yes Yes Yes Yes No No Yes Yes ? ?
Eureka Email ? ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No
Gnus ? ? Yes Yes ? ? ? ? ? ? ? ?
GroupWise ? ? ? ? ? ? ? ? ? ? ? ?
i.Scribe / InScribe Yes Yes Yes No Yes Yes No No No No No No
IBM Lotus Notes Yes ? Yes ? Yes Yes Yes ? Yes ? Yes Yes
KMail Yes Yes Yes Yes Yes Yes No No ? ? ? ?
Libremail ? [Note 38]:{{{3}}} No No No ? [Note 38]:{{{3}}} No No No No No No No
Mail (OS X) Yes ? Yes Yes Yes ? No No Yes ? ? ?
Microsoft Entourage Yes ? Yes ? Yes ? Yes ? Yes ? ? ?
Microsoft Office Outlook Yes No Yes Yes Yes Yes ? ? ? ? ? ?
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Mulberry Yes Yes Yes Yes Yes Yes No No Yes Yes ? ?
Mutt Yes Yes Yes Yes 1.5.15 1.5.15 ? ? ? ? ? ?
Netscape Messenger ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ? ? ?
Opera Mail Yes Partial [Note 39]:{{{3}}} Yes Partial [Note 39]:{{{3}}} Yes Partial [Note 39]:{{{3}}} Yes No N/A N/A Yes Yes
Outlook Express Yes Yes Yes Yes Yes Yes ? ? ? ? ? ?
Pegasus Mail Yes Yes Yes Yes Yes Yes ? ? Yes ? ? ?
Pine Yes Yes Yes Yes Yes Yes Yes Yes No No ? ?
Pocomail ? ? ? ? ? ? ? ? ? ? ? ?
Pop Peeper Yes Yes Yes Yes Yes Yes ? ? ? ? ? ?
RoundCube Yes Yes Yes Yes Yes Yes No No Yes Yes ? ?
SeaMonkey Mail & Newsgroups Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Spicebird Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
SquirrelMail Yes Yes Yes Yes Yes Yes No No Yes Yes ? ?
Sylpheed Yes Yes Yes Yes Yes Yes Yes Yes ? ? ? ?
The Bat! Yes Yes Yes Yes Yes Yes No No No No Yes [Note 40]:{{{3}}} Yes [Note 40]:{{{3}}}
Trojitá ? ? Yes Yes Yes Yes ? ? ? ? Yes (system) Yes (system)
Turnpike ? ? ? ? ? ? ? ? ? ? ? ?
Windows Live Mail Yes No Yes No Yes No ? ? ? ? ? ?
Windows Mail Yes ? Yes ? Yes ? ? ? ? ? ? ?
YAM ? ? ? ? ? ? ? ? ? ? ? ?
Zimbra Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes ? ?
Client Secure POP3 Secure IMAP4 Secure SMTP Secure NNTP Secure LDAP OCSP [Note 34]:{{{3}}} CRL [Note 35]:{{{3}}}
SSL TLS [Note 36]:{{{3}}} SSL TLS [Note 36]:{{{3}}} SSL TLS [Note 37]:{{{3}}} SSL TLS SSL TLS

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Features

Information on what features each of the clients support.

General features

For all of these clients, the concept of "HTML support" does not mean that they can process the full range of HTML that a web browser can handle. Almost all email readers limit HTML features, either for security reasons, or because of the nature of the interface. CSS and JavaScript can be especially problematic. A number of articles describe these limitations per-email-client; see 1, 2, 3, and 4

Client HTML email UTF-8 support Image blocking Junk filtering Phishing filtering Thread view Conversation view PGP support S/MIME support
local server- side inline PGP/MIME or OpenPGP protocol OCSP CRL certificates on tokens, smartcards support
Alpine Yes Yes Yes ? ? ? Yes ? Yes ? Yes ? ? ?
Atmail Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Becky! Internet Mail Yes Yes Yes No No No Yes No Yes ? Yes ? ? ?
Citadel Yes Yes No Yes [Note 41]:{{{3}}} ? ? No ? ? ? ? ? ?
Claws Mail Read-only Yes Yes Yes Yes Yes Yes ? Yes Yes Yes ? Yes Yes
Clyton Yes Yes Yes Client-side Yes No Yes No No No No No No No No
Cone Yes Yes Yes Yes No No Yes ? No Yes No No No No
Courier Yes No No Yes Yes ? No ? ? ? ? ? ? ?
Elm ? ? ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Yes Yes Yes No Yes Yes No No No No Yes No Yes Yes
EmailTray Yes Yes Yes No Yes ? No No No No No No No No
Eudora Yes No Yes Pro only Pro only ? Yes No Yes [Note 42]:{{{3}}} Yes [Note 42]:{{{3}}} Yes ? ? ?
Eureka Email ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes Yes Yes Yes ? No Yes Yes Yes Yes Yes ? ? ?
Gnus Yes Yes Yes Yes Yes ? Yes ? Yes Yes Yes ? ? Yes
GroupWise Yes Yes Yes Yes ? ? Yes ? ? ? ? ? ? ?
i.Scribe / InScribe Read-only Yes Yes Yes No ? Yes ? Yes No No No No No
IBM Notes Yes Yes Yes Yes Yes Yes Yes [Note 43]:{{{3}}} ? Yes Yes
(4.1.2+)		 Yes Yes, [3] Yes Yes
KMail Yes Yes Yes Yes ? ? Yes Yes Yes
(with GPG)		 Yes
(1.5+, with GPGME)		 Yes Yes Yes ?
Libremail Read-only [Note 44]:{{{3}}} Yes Yes [Note 45]:{{{3}}} [Note 46]:{{{3}}} Yes [Note 47]:{{{3}}} No No No No No No No No No
Mail (OS X) Yes Yes Yes Yes Yes Yes Yes Yes Yes [Note 48]:{{{3}}} Yes [Note 48]:{{{3}}} Yes Yes Yes Yes
Mailbird Yes Yes Yes Yes Yes Yes Yes Yes ? No No No No No
Microsoft Entourage Yes Yes Yes Yes Yes Yes ? ? ? Yes Yes ? ? Yes
Microsoft Office Outlook Yes Yes Yes Yes Yes Yes Yes Yes (2010+)[55] No No Yes ? ? ?
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes [Note 49]:{{{3}}} Yes Yes Yes Yes [Note 50]:{{{3}}} Yes Yes Yes [Note 51]:{{{3}}} Yes Yes Yes ? Yes
Mulberry Yes Yes Yes No Yes ? Yes ? Yes [Note 52]:{{{3}}} Yes [Note 52]:{{{3}}} Yes [Note 52]:{{{3}}} ? ? ?
Mutt Read-only Yes Yes
(no support for images)		 Yes ? ? Yes ? Yes Yes Yes ? Yes (with GPGME) ?
Netscape Messenger ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Opera Mail Yes Yes Yes Yes Yes No Yes No No No No No No No
Outlook Express Yes Yes Yes No ? ? Yes ? Yes [Note 53]:{{{3}}} No [Note 54]:{{{3}}} Yes ? ? ?
Pegasus Mail Yes Yes Yes Yes Yes Yes Yes ? Yes Yes
(sending is broken)		 ? No No No
Pine Read-only Yes Yes No ? ? Yes ? Yes
(with Pine Privacy Guard)		 No Yes ? ? ?
Pocomail Yes Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Pop Peeper Yes ? Yes Yes Yes ? ? ? ? ? ? ? ? ?
RoundCube Yes Yes Yes Yes Yes Yes (depends on antivirus) Yes ? ? Yes Yes ? ? ?
SeaMonkey Mail & Newsgroups Yes Yes Yes Yes ? Yes Yes ? Yes [Note 51]:{{{3}}} Yes [Note 51]:{{{3}}} Yes Yes ? Yes
Spicebird Yes Yes Yes Yes ? Yes Yes ? Yes Yes Yes Yes ? Yes
SquirrelMail Yes Yes Yes Yes Yes Yes (depends on antivirus) Yes ? ? Yes Yes ? ? ?
Sylpheed No [Note 55]:{{{3}}} Yes Yes Yes ? ? Yes ? No Yes ? ? ? ?
The Bat! Yes Yes Yes [Note 56]:{{{3}}} Yes Yes ? Yes ? Yes Yes Yes Partial [Note 57]:{{{3}}} Partial [Note 57]:{{{3}}} Yes [Note 57]:{{{3}}}
Trojitá Read only Yes Yes No Yes No Yes Yes No No No No No No
Turnpike Read-only ? ? ? ? ? ? ? ? ? ? ? ? ?
Windows Live Mail Yes Yes Yes Yes Yes Yes Yes Yes Yes ? Yes ? ? ?
Windows Mail Yes Yes ? Yes ? ? ? ? ? ? ? ? ? ?
YAM ? Yes ? ? ? ? ? ? ? ? ? ? ? ?
Zimbra Yes Yes Yes Yes Yes Yes (depends on antivirus) Yes ? ? No ? ? ?
Client HTML email UTF-8 support Image blocking Junk filtering Phishing filtering Thread view Conversation view PGP support S/MIME support
local server- side inline PGP/MIME or OpenPGP protocol OCSP CRL certificates on tokens, smartcards support

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Messages features

Client Label messages Reformat received messages Bi-directional text support Composing messages Native images preview Postpone / scheduled message sending Native documents preview
with colors with flag antidelete add note edit headers (e.g., Subject) forced recode [Note 58]:{{{3}}} Spell checking Signatures Bottom-posts replies jpeg gif bmp png others txt pdf doc xls odt ods others
Alpine Yes Yes ? ? ? ? ? Yes Yes ? ? ? ? ? ? Yes Yes ? ? ? ? ? ?
Atmail Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No
Becky! Internet Mail Yes Yes ? Yes Yes Yes ? Yes Yes Yes Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Citadel ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Claws Mail Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes ? Yes Yes with a plugin ? ? ? ? ?
Clyton Yes No No No Yes No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes ?
Cone Yes Yes Yes No ? ? ? Yes No ? No No No No No ? ? ? ? ? ? ? ?
Courier Yes Yes No No Yes ? ? Yes Yes ? No No No No No Yes ? No No No No No ?
Elm ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Yes Yes No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes No ? ? ? ? ? ? ?
EmailTray Yes No No No No No ? Yes Yes Yes Yes Yes Yes Yes ? No Yes Yes Yes Yes No No ?
Eudora Yes Yes No No Yes ? ? Yes Yes ? Yes Yes Yes Yes QuickTime Yes ? ? ? ? ? ? ?
Eureka Email ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes Yes ? ? No ? Yes Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Gnus Yes Yes Yes ? ? ? ? Yes Yes Yes Yes Yes Yes Yes XPM Yes ? ? ? ? ? ? ?
GroupWise Yes Yes Yes Yes Yes ? ? Yes Yes Yes Yes Yes Yes Yes ? Yes Yes Yes Yes Yes Yes Yes ?
i.Scribe / InScribe Yes No No Yes No No No Yes [Note 59]:{{{3}}} Yes Yes Yes [Note 60]:{{{3}}} Yes Yes Yes [Note 61]:{{{3}}} ICO, TIFF Yes No No No No No No No
IBM Notes Yes Yes ? ? Yes ? ? Yes Yes ? Yes Yes Yes No CGM, Lotus PIC, PCX, TIFF ? Yes Yes Yes Yes ? ? ?
KMail Yes[74] Yes No No ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Libremail No No No No outside [Note 62]:{{{3}}} No ? No Yes Yes No [Note 45]:{{{3}}} No No No [Note 45]:{{{3}}} No [Note 45]:{{{3}}} Yes[Note 63]:{{{3}}} No [Note 45]:{{{3}}} No No No No No Enclosure emails
Mail (OS X) Yes Yes ? Yes ? ? ? Yes Yes ? Yes Yes Yes Yes any QuickTime supported format No ? Yes ? ? ? ? ?
Mailbird Yes Yes ? Yes ? ? ? Yes Yes Yes Yes Yes Yes Yes ? Yes Yes Yes Yes Yes No No ?
Microsoft Entourage Yes Yes ? Yes[Note 64]:{{{3}}} ? ? ? Yes Yes ? Yes Yes ? Yes ? ? ? Yes ? ? ? ? ?
Microsoft Office Outlook Yes Yes No Yes Yes ? ? Yes Yes No Yes Yes Yes Yes ? Yes Yes with a plugin Yes Yes 2010 2010 PowerPoint
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes ? ? with a plugin[4], not via IMAP [5] ? ? Yes Yes Yes [Note 65]:{{{3}}} Yes Yes Yes Yes ICO Yes [Note 66]:{{{3}}} Yes Yes No No No No No
Mulberry ? Yes ? ? ? ? ? Yes Yes ? No No No No No ? ? ? ? ? ? ? ?
Mutt Yes Yes No No Yes ? ? Yes Yes ? No No No No No postpone ? ? ? ? ? ? ?
Netscape Messenger ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Opera Mail Yes Yes No No ? ? Yes Yes Yes ? Yes Yes Yes Yes APNG, ICO, SVG, WBMP, XBM, WebP No No No No No No No No
Outlook Express No Yes No No ? ? ? Yes Yes ? Yes Yes Yes Yes ICO, art ? ? ? ? ? ? ? ?
Pegasus Mail Yes Yes Yes Yes in index No No Yes Yes No [Note 67]:{{{3}}} Yes Yes Yes Yes TIFF N/A Yes No No No No No RTF, HTML
Pine Yes Yes ? ? No with a patch [Note 68]:{{{3}}} ? Yes [Note 69]:{{{3}}} Yes ? No No No No No ? ? ? ? ? ? ? ?
Pocomail Yes Yes ? Yes ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Pop Peeper Yes Yes ? ? ? ? ? Yes Yes ? ? ? ? ? ? ? ? ? ? ? ? ? ?
RoundCube Yes Yes Yes Yes ? ? Yes Yes Yes ? Yes Yes Yes Yes ? ? Yes Yes Yes Yes Yes Yes ?
SeaMonkey Mail & Newsgroups Yes Yes No No ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
SquirrelMail Yes Yes Yes Yes ? ? Yes Yes Yes ? Yes Yes Yes Yes ? ? Yes Yes Yes Yes Yes Yes ?
Sylpheed Yes Yes No No ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? Yes No No No No No ?
The Bat! Yes Yes Yes Yes No No No Yes Yes Yes Yes Yes Yes Yes ICO, emf Yes Yes No No No No No No
Trojitá No Yes ? ? No No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No ?
Turnpike Yes ? ? No ? ? ? Yes Yes ? Yes Yes Yes No ? ? ? ? ? ? ? ? ?
Windows Live Mail No Yes No No ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Windows Mail ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
YAM ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Zimbra Yes Yes Yes Yes ? ? ? Yes Yes ? Yes Yes Yes Yes ? ? ? ? ? ? ? ? ?
Client Label messages Reformat received messages Bi-directional text support Composing messages Native images preview Postpone/?scheduled message sending Native documents preview
with colors with flag antidelete add note edit headers (e.g., Subject) forced recode [Note 58]:{{{3}}} Spell checking Signatures Bottom-posts replies jpeg gif bmp png others txt pdf doc xls odt ods others

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Database, folders and customization

Client Message file format Encrypted database Virtual folders Scheduled backup New mail notification Customizable interface Customizable keybindings Fragmented messages [Note 70]:{{{3}}} Database search with regular expressions support Indexed search Search folders [Note 71]:{{{3}}} IMAP
ticker tray icon tooltip sound Search IDLE
Alpine mbox, mbx, MIX, maildir (with patches), MMDF, tenex, mtx, MH, mx, news, phile ? Yes Partial ? ? ? Yes Yes No ? No Yes Yes Yes No
Atmail maildir, imap, mbox Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes ?
Becky! Internet Mail mbox ? ? No Yes ? Yes Yes ? ? ? Yes ? Yes Yes Yes
Citadel ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Claws Mail MH, mbox (plugin) No No No Yes Yes Yes Yes Yes Yes ? ? ? No Yes No
Clyton eml No [Note 72]:{{{3}}} No No No No No Yes and bold-face the folder name Yes No No Limited to wild-cards No No Yes ?
Cone mbox, maildir No No No No ? ? ? Yes (colors) No No No No Yes Yes Yes
Courier Proprietary Yes (weak) Yes ? ? ? ? ? Yes (layout) No ? No No Yes No Yes
Elm ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Proprietary (sqlite) Yes Yes Yes Yes Yes No Yes Yes Yes No No Yes Yes No Yes
EmailTray Proprietary Yes Yes No Yes Yes No Yes No No No No Yes Yes ? ?
Eudora modified mbox No Yes No No Yes Yes Yes Yes Yes Yes Yes[specify] Yes Yes Yes ?
Eureka Email Proprietary ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Evolution maildir, mbox, MH No Yes No No Yes Yes Yes Partial Yes [Note 73]:{{{3}}} Yes Yes Yes Yes Yes Yes
Gnus babyl, maildir, mbox, MMDF, news, rnews, SOUP, outlook, oe-dbx No Yes No No ? ? ? Yes Yes Yes Yes No Yes Yes ?
GroupWise Proprietary Yes Yes Yes ? Yes Yes Yes Yes ? ? ? Yes Yes Yes No
IBM Notes Proprietary Yes [6] Yes Yes Yes Yes Yes Yes Yes Yes Yes [Note 74]:{{{3}}} No Yes Yes ? No
KMail mbox, maildir No Yes No ? ? ? ? Yes Yes No Yes ? Yes Yes Yes
Libremail maildir No No Yes [Note 75]:{{{3}}} No No No No Yes [Note 76]:{{{3}}} for programmers [Note 77]:{{{3}}} No Partial [Note 78]:{{{3}}} No No No No
Mail (OS X) Proprietary ? Yes Yes ? Yes ? Yes Yes ? ? ? Yes [Note 79]:{{{3}}} Yes [Note 80]:{{{3}}} ? Yes
Mailbird Proprietary No Yes No Yes Yes Yes Yes Yes Yes No Yes Partial Yes Yes Yes
Microsoft Entourage Proprietary (Personal Storage Table) ? Yes Partial [Note 81]:{{{3}}} ? ? ? ? Partial No No Partial [Note 82]:{{{3}}} Yes Yes Yes Yes
Microsoft Office Outlook Proprietary (Personal Storage Table) Yes Yes Yes ? Yes Yes Yes Yes Yes ? ? Yes [Note 83]:{{{3}}} Yes Yes Yes
Mozilla Mail & Newsgroups mbox ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird mbox No Yes ? ? Yes Yes Yes Yes [Note 84]:{{{3}}} ? No ? Yes (as of 3.0) Yes Yes Yes
Mulberry mbox [Note 85]:{{{3}}} Partial [Note 86]:{{{3}}} Partial [Note 86]:{{{3}}} Partial [Note 86]:{{{3}}} ? ? ? ? Yes ? ? Yes[specify] Partial [Note 86]:{{{3}}} No Yes No
Mutt mbox, MMDF, MH, maildir Yes (with compressed folders patch [7]) ? (has limit command) No ? ? ? ? Yes Yes ? Yes no integrated solutions available[88] No (easily integrated with mairix) Yes Yes
Netscape Messenger mbox ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 mbox ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH MH No Yes No No ? ? ? Yes Yes ? Yes Yes Yes No ?
Opera Mail mbox, MH, Proprietary No Yes
(all folders are virtual)		 No No Yes Yes Yes Yes Yes No Yes Yes Yes ? Yes
Outlook Express Proprietary No No No ? Yes No Yes No No Yes ? No ? ? Yes
Pegasus Mail Proprietary (mbox-like) No Yes No ? Yes Yes Yes Yes ? ? Yes ? Yes Yes No[89]
Pine mbox, mbx, MIX, maildir (with patches), MMDF, tenex, mtx, MH, mx, news, phile ? ? ? ? ? ? ? ? ? ? ? ? ? ? No
Pocomail mbox Yes Yes Yes ? ? ? ? Yes ? ? Yes Yes Yes ? ?
Pop Peeper proprietary Yes No Yes ? ? ? ? Yes ? ? No No No ? Yes
RoundCube [IMAP Server] ? ? ? Yes No No Yes Yes Yes ? ? ? Yes Yes ?
i.Scribe / InScribe Proprietary (sqlite) No No No No Yes No Yes Yes No No No No No No Yes
SeaMonkey Mail & Newsgroups mbox ? ? ? Yes Yes Yes Yes ? ? ? ? ? ? Yes Yes
SquirrelMail [IMAP Server] ? ? ? Yes No No Yes Yes Yes ? ? ? Yes Yes ?
Sylpheed MH No Yes No ? Yes ? ? Yes Yes No No [Note 87]:{{{3}}} No [Note 87]:{{{3}}} Yes ? No
The Bat! Proprietary Yes (AES 128 bit)

(with Pro and Voyager version) [Note 88]:{{{3}}}

 Yes Yes Yes Yes No Yes Yes Yes Yes Yes

(PCRE 6.2)

 No Yes Yes Yes
Trojitá ? ? ? ? ? ? ? ? ? ? ? ? ? ? Yes Yes
Turnpike Proprietary Yes Yes ? ? ? ? ? ? ? Yes ? ? Yes ? ?
Windows Live Mail File System (.eml) No No No No Yes ? Yes Yes No Yes No Yes Yes ? ?
Windows Mail ? ? ? ? ? ? ? Yes ? ? ? ? ? ? ? Yes
YAM ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Zimbra File system No Yes Yes ? ? ? ? Yes Yes Yes Yes Yes Yes Yes Yes
Client Message file format Encrypted database Virtual folders Scheduled backup New mail notification Customizable interface Customizable keybindings Fragmented messages [Note 70]:{{{3}}} Database search with regular expressions support Indexed search Search folders [Note 71]:{{{3}}} IMAP
ticker tray icon tooltip sound Search IDLE

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Templates, scripts and programming languages

Client Message templates Message templates individual for Support in message templates scripts, programming languages
new reply forward read confirmation save print JavaScript VBScript PHP Scripts Python Regular expressions Java Other (specify)
Alpine Yes Yes Yes ? ? ? any No No No No ? No ?
Atmail Yes Yes Yes Yes Yes Yes any Yes No Yes No No No No
Becky! Internet Mail Yes Yes Yes Yes Yes Yes any
account
folder
 ? ? ? ? ? ?
Citadel ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Claws Mail Yes Yes Yes Yes Yes Yes account
folder
 No No No Yes ? ? Perl
Clyton Yes Yes Yes No No No account folder No No No No No No Gammadyne G-Merge
Cone Yes No No No No No ? No No No No No No No
Courier Yes Yes Yes No Yes Yes ? No No No No No No No
Elm ? ? ? ? ? ? ? ? ? ? ? ? ? ?
eM Client Yes Yes Yes Yes Yes Yes account No No No No No No No
Eudora Yes Yes Yes Yes Yes Yes any No No No No Yes No No
Eureka Email ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Evolution Yes Yes Yes Yes Yes Yes ? ? ? ? ? ? ? ?
Gnus Yes Yes Yes Yes Yes Yes ? No No No No Yes No elisp
GroupWise Yes No No Yes Yes ? ? ? ? ? ? ? ? ?
i.Scribe / InScribe Yes Yes Yes No No No any No No No No No No Internal macros (similar to JavaScript)
IBM Notes Yes Yes Yes Yes ? ? ? Yes No No No Yes [8] Yes LotusScript, Formula language
KMail Yes Yes Yes No No No none ? No No No ? ? ?
Libremail No Yes[Note 89]:{{{3}}} No No ? ? Auto reply No No No No No No No
Mail (OS X) Yes Mac OS 10.5 (Leopard) No No No ? ? ? No No No No No ? AppleScript, Automator
Microsoft Entourage Yes Yes Yes Yes ? ? ? ? ? ? ? ? ? AppleScript, Automator
Microsoft Office Outlook Yes Yes Yes Yes ? ? ? ? ? ? ? ? ? ?
Mozilla Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Mozilla Thunderbird Yes Yes[Note 90]:{{{3}}} Yes[Note 90]:{{{3}}} Yes Yes Yes profile Yes ? ? ? ? ? ?
Mulberry Yes Yes Yes Yes ? ? ? No No No No ? ? ?
Mutt Yes Yes Yes No ? ? any No No No No Yes ? Internal macros
Netscape Messenger ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Netscape Messenger 9 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
nmh / MH ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Opera Mail No No No No No No N/A No No No No No No No
Outlook Express Yes Yes ? Yes ? ? ? Yes Yes ? ? ? ? ?
Pegasus Mail Yes Yes Yes Yes ? ? ? ? ? ? ? ? ? ?
Pine Yes Yes Yes ? ? ? any ? No No ? ? No ?
Pocomail Yes Yes Yes ? ? Yes ? No No No No No No PocoScript
Pop Peeper ? ? ? ? ? ? ? ? ? ? ? ? ? ?
RoundCube Yes Yes Yes Yes Yes Yes Yes No No No No No No ?
SeaMonkey Mail & Newsgroups ? ? ? ? ? ? ? ? ? ? ? ? ? ?
SquirrelMail Yes Yes Yes Yes Yes Yes Yes No No No No No No ?
Sylpheed Yes Yes Yes ? ? ? ? No No No No No ? ?
The Bat! Yes Yes Yes Yes Yes Yes account
folder
address book group
contact		 Yes [Note 91]:{{{3}}} Yes [Note 92]:{{{3}}} Yes [Note 93]:{{{3}}} Yes [Note 94]:{{{3}}} Yes PCRE 6.2 Internal and plugins macros
Turnpike ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Windows Live Mail Yes[Note 95]:{{{3}}} Yes[Note 95]:{{{3}}} ? Yes[Note 95]:{{{3}}} ? ? ? Yes No ? ? ? ? ?
Windows Mail ? ? ? ? ? ? ? ? ? ? ? ? ? ?
YAM Yes Yes Yes ? Yes Yes ? No No No No ? ? ARexx
Zimbra Yes Yes Yes Yes Yes Yes any No No No No No ? ?
Client Message templates Message templates individual for Support in message templates scripts, programming languages
new reply forward read confirmation save print JavaScript VBScript PHP Scripts Python Regular expressions Java Other (specify)

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Internationalization

The Bat! supports Email Address Internationalization (EAI).[116][better source needed][discuss]

As of April, 2014, there are no email clients that support SMTPUTF8.

See also

References

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External links

sv:E-postprogram#Jämförelse av epostklienter
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  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Pegasus Mail: April 21sth 2016 - Pegasus Mail v4.72
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Write to LDAP still missing after 10 years, Mozilla bug 86405
  15. ↑ Add-ons include MesQuilla ExQuilla Exchange Web Services (alpha) and Provider for Microsoft Exchange
  16. ↑ Sort Your Emails by Conversation in Outlook 2010 - How-To Geek
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  19. ↑ http://www.google.com/search?q=kmail+colors&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a
  20. ↑ MuttWiki: UserCases/SearchingMail
  21. ↑ http://community.pmail.com/forums/post/17967.aspx
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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