Client Name
and version
SMTP POP3 IMAP4 IMSP/ACAP LDAP Comments
Pine 4.x CRAM-MD5,
LOGIN,
GSSAPI,
KERBEROS_V4?
? CRAM-MD5,
LOGIN,
GSSAPI,
KERBEROS_V4?
? -  
Mulberry v1.4.3 PLAIN, 
CRAM-MD5, 
KERBEROS_V4 
DIGEST-MD5
PLAIN, 
CRAM-MD5, 
KERBEROS_V4 
DIGEST-MD5
PLAIN, 
CRAM-MD5, 
KERBEROS_V4 
DIGEST-MD5
PLAIN, 
CRAM-MD5, 
KERBEROS_V4 
DIGEST-MD5
PLAIN, 
CRAM-MD5, 
KERBEROS_V4 
DIGEST-MD5
LDAP v3 is planning
Execmail 5.2 (formerly Simeon) PLAIN, 
KERBEROS_V4, 
CRAM-MD5 
DIGEST-MD5,
GSSAPI
PLAIN, 
KERBEROS_V4, 
CRAM-MD5 
DIGEST-MD5,
GSSAPI
PLAIN, 
KERBEROS_V4, 
CRAM-MD5 
DIGEST-MD5,
GSSAPI
 Same as IMAP4/- + POP3 supports also APOP
Eudora Pro 4.3 CRAM-MD5,
PLAIN,
LOGIN
Kerberos_V4, 
RPA
CRAM-MD5, 
Kerberos_V4
- ? POP3 supports also APOP
PalmOS Eudora CRAM-MD5 in next release APOP in next release N/A N/A  
Outlook, 
Outlook Express 4.0
LOGIN, 
NTLM, 
DPA
LOGIN, 
NTLM, 
DPA
LOGIN, 
NTLM, 
DPA
- - Supports draft-10 of SMTP AUTH spec (i.e. "AUTH=", but not "AUTH ") 
Nestcape Messenger 4.6 PLAIN ? PLAIN  ?  ?  
Paladin CRAM-MD5 - CRAM-MD5 - -  
Gnus ? ? PLAIN, 
CRAM-MD5, 
DIGEST-MD5, 
KERBEROS_V4, 
GSSAPI
?   Patch for SMTP: CRAM-MD5 exists
Also support STARTTLS
Control Data's IMAPSP PLAIN, SKEY, CRAM-MD5 - PLAIN, SKEY, CRAM-MD5 - - IMAP4rev1/SMTP MAPI service providers
Orangsoft Winbiff 2.30 PLAIN,
LOGIN,
CRAM-MD5
 LOGIN LOGIN,
CRAM-MD5
- +  POP3 also supports APOP
FetchMail 5.0.3 ? OTP, 
RPA
OTP, 
GSSAPI (RFC 1731), 
KERBEROS_V4, 
CRAM-MD5
-   POP3 also supports APOP and KPOP authentication. 
RPA stands for "Remote Password Authentication", proprietary CompuServe SASL 
Pegasus Mail 3.12 CRAM-MD5,
LOGIN
- ? ? ? POP3 supports APOP. 
MH UCI 6.8.3 ? - ? ? ? POP3 supports APOP &
KPOP 
nmh 1.0.4 See CMU SASL library See CMU SASL library ? ? ? POP3 supports security layer
PMMail ? RPA,
APOP
? ? ?  
Akmail CRAM-MD5 ? ? ? ?  
***APOP and KPOP are not SASL mechanisms, they are listed only for completenes***

I want to see IETF standard related pages

If you want to add/update information, send me email

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Last updated 08 September 2000

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