Main copy is located here. It may contain newer information.


Server Name
and version
SMTP (AUTH command) POP3 IMAP4 IMSP/ACAP Comments
Isode M-Switch (MTA) + M-Box CRAM-MD5,
DIGEST-MD5,
PLAIN,
NTLM,
GSSAPI,
SRP,
EXTERNAL
- CRAM-MD5,
DIGEST-MD5,
PLAIN,
NTLM,
GSSAPI,
SRP,
OTP
N/A Uses Cyrus-SASL
Sendmail Since 8.10:
CRAM-MD5,
DIGEST-MD5,
PLAIN,
LOGIN,
GSSAPI,

Since 8.12:
+ EXTERNAL
N/A N/A N/A Uses Cyrus-SASL
Postfix (since snapshot-20000314 or release-20010228) CRAM-MD5,
DIGEST-MD5,
PLAIN,
LOGIN,
GSSAPI
N/A N/A N/A Uses Cyrus-SASL
qmail LOGIN,
PLAIN,
CRAM-MD5
N/A N/A N/A SMTP AUTH is available as a patch. More information here. The updated patch is here.
Exim 3.10 CRAM-MD5 N/A N/A N/A  
UW 4.6 Beta N/A LOGIN
CRAM-MD5, 
GSSAPI (KERBEROS V5),
LOGIN
CRAM-MD5, 
GSSAPI (KERBEROS V5),
N/A  
Cyrus v2.2.9  (experimental serv.) 
KERBEROS_V4, 
CRAM-MD5
CRAM-MD5,
DIGEST-MD5,
PLAIN,
NTLM,
KERBEROS_V4,
GSSAPI,
SRP,
OTP,
EXTERNAL
CRAM-MD5,
DIGEST-MD5,
PLAIN,
NTLM,
KERBEROS_V4,
GSSAPI,
SRP,
OTP,
EXTERNAL
KERBEROS_V4/ ANONYMOUS Uses Cyrus-SASL
MessagingDirect M-Store 3.X/4.X N/A
PLAIN
CRAM-MD5,
KERBEROS_V4,
DIGEST-MD5,
GSSAPI

PLAIN
CRAM-MD5,
KERBEROS_V4,
DIGEST-MD5,
GSSAPI
N/A Previously known as SMS (Simeon Message Service)
Communigate Pro PLAIN,
LOGIN,
CRAM-MD5,
DIGEST-MD5
PLAIN,
LOGIN,
CRAM-MD5,
DIGEST-MD5,
NTLM,
MSN
PLAIN,
LOGIN,
CRAM-MD5,
DIGEST-MD5,
NTLM
MSN
PLAIN,
LOGIN,
CRAM-MD5,
DIGEST-MD5,
NTLM
DIGEST-MD5 is supported since 3.4.4,
NTLM is implemented in 3.5b1
Sun Internet Mail Server 4.0 PLAIN PLAIN PLAIN N/A  
Netscape Messenger 3.62 LOGIN LOGIN LOGIN N/A  
Microsoft Exchange Server V5.5 LOGIN PLAIN,
NTLM,
DPA
PLAIN,
NTLM,
DPA
N/A NTLM and DPA are not yet registered with IANA
Process Software PMDF 6.2 DIGEST-MD5, 
CRAM-MD5, 
PLAIN, 
LOGIN
DIGEST-MD5, 
CRAM-MD5, 
PLAIN, 
LOGIN
DIGEST-MD5, 
CRAM-MD5, 
PLAIN, 
LOGIN
N/A  Also supports APOP
Eudora WorldMail 2.0 - CRAM-MD5 CRAM-MD5 N/A / PLAIN, CRAM-MD5 ACAP Server is not true ACAP, but ACAP-like
Eudora Internet Mail Server 2.2.2 CRAM-MD5 - - N/A / CRAM-MD5 POP3 supports APOP. ACAP Server is not true ACAP, but ACAP-like
CentreNET AT-Mail Server v1.1 ? ? CRAM-MD5 ?  
cc:Mail IMAP Connector N/A N/A CRAM-MD5 N/A  
VOPmail
1.0.174
LOGIN,
NTLM,
CRAM-MD5,
SCRAM-MD5
LOGIN,
NTLM,
CRAM-MD5,
SCRAM-MD5
LOGIN,
NTLM,
CRAM-MD5,
SCRAM-MD5
N/A  
CDC Intrastore  - ANONYMOUS,
CRAM-MD5,
SKEY
ANONYMOUS,
CRAM-MD5,
SKEY
  POP3 also supports APOP.
Software.com InterMail 4.1 PLAIN PLAIN PLAIN N/A  
Critical Path (formerly Isocor) InScribe Messaging Server (formerly N-Plex) 5.1 LOGIN
CRAM-MD5
CRAM-MD5 CRAM-MD5 N/A  
Infinite Interchange 3.51 - - LOGIN
CRAM-MD5
N/A  
MailSuite SQL Enterprise 2.1.5 CRAM-MD5 CRAM-MD5 CRAM-MD5 N/A  
Open Mail 5.10 - - - N/A  
QPopper 3.0 N/A SCRAM, APOP N/A N/A  
VPOP3 LOGIN PLAIN,
LOGIN,
APOP
PLAIN,
LOGIN
N/A Plan to add CRAM-MD5 to all supported protocols
Hermes Mail Server CRAM-MD5 - N/A N/A  
IPSwitch IMail Server 7.13 LOGIN,
CRAM-MD5
PLAIN,
LOGIN,
CRAM-MD5
PLAIN,
LOGIN,
CRAM-MD5
N/A POP3 supports APOP
Mercur 3.0 - - - N/A  
NT Mail 3.03C - - - N/A  
Hamster server/proxy LOGIN,
PLAIN (only with TLS),
CRAM-MD5,
CRAM-SHA1
LOGIN,
PLAIN (only with TLS),
CRAM-MD5,
CRAM-SHA1
LOGIN,
PLAIN (only with TLS),
CRAM-MD5,
CRAM-SHA1
N/A Also supports old SMTP AUTH syntax (Auth=LOGIN).
POP3 supports APOP.
WinGate server/proxy LOGIN,
PLAIN,
CRAM-MD5,
NTLM

PLAIN,
CRAM-MD5,
NTLM
LOGIN,
PLAIN,
CRAM-MD5,
NTLM
N/A Also supports APOP
BatPost! server LOGIN,
PLAIN,
CRAM-MD5,
NTLM
LOGIN,
PLAIN,
CRAM-MD5,
NTLM
LOGIN,
PLAIN,
CRAM-MD5,
NTLM
N/A Also supports APOP

Server Name and version LDAP SASL Comments
LDAPv3 Distributed Directory Server CRAM-MD5  
iPlanet Directory Server EXTERNAL  
Microsoft Active Directory GSSAPI,
GSS-SPNEGO
 
OpenLDAP 2.0.7 all CMU SASL library can do  
IBM SecureWay Directory Server CRAM-MD5,
GSSAPI,
EXTERNAL
 

Legend
* - mechanism will be supported in the next release
? - No Information
- - Server doesn't support any SASL
N/A - Not Applicable (i.e. such server doesn't exist)
recent updates are marked purple

If you want to add/update information, send the author an email

Table of contents for IETF standard related pages

List composed by Alexey Melnikov. Feel free to send him updates/additions/comments to this list.
Information published on this page is for developers use only. It is prohibited to use this information for commercial purposes.
There is no guaranty that information on this page is accurate and/or up-to-date.

Last updated 10 May 2006

Thank you to all people who sent me updates