ID
Client
Regular LOGIN
Regular PLAIN
MSN (NTLM) browser login
Compuserve (RPA)
MD5 APOP
CRAM-HMAC MD5
CRAM-HMAC SHA1
CRAM-HMAC RIPEMD
DIGEST-MD5
with hardware token PKCS#11
Biometric
SMTP Auth
SSL/TLS Client Certificate
1
Alpine
Yes
Yes
No
No
No
Yes
No
No
No
No
No
Yes
No
2
Atmail
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
3
Becky! Internet Mail
Yes
Yes
Yes
?
Yes
Yes
?
?
?
?
?
Yes
Yes
4
Citadel
?
?
?
?
?
?
?
?
?
?
?
?
?
5
Claws Mail
Yes
Yes
?
?
Yes
Yes
?
?
Yes
Yes
?
Yes
Yes
6
Cone
Yes
Yes
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
7
Courier
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
8
Elm
?
?
?
?
?
?
?
?
?
?
?
?
?
9
eM Client
Yes
Yes
Yes
No
No
Yes
No
No
Yes
No
No
Yes
No
10
EmailTray
Yes
Yes
?
?
Yes
Yes
Yes
No
?
No
No
Yes
No
11
Eudora
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
?
12
Eureka Email
?
?
?
?
?
?
?
?
?
?
?
?
?
13
Evolution
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
No
No
Yes
Yes
14
Gnus
Yes
Yes
?
?
Yes
Yes
Yes
?
Yes
?
?
Yes
?
15
GroupWise
?
?
?
?
?
?
?
?
?
?
?
?
?