2831 - Using Digest Authentication as a SASL Mechanism (DIGEST-MD5)
2245 - Anonymous SASL Mechanism.
+ 2087 - IMAP4 QUOTA extension
2088 - IMAP4 non-synchronizing literals (LITERAL+)
2177 - IMAP4 IDLE command
2221 - IMAP4 Login Referrals
3348 - IMAP4 Child Mailbox Extension
3502 - IMAP4 MULTIAPPEND Extension
3691 - IMAP4 UNSELECT command
+ 4314 - IMAP4 Access Control List (ACL) Extension
4315 - IMAP UIDPLUS extension
4551 - IMAP Extension for Conditional STORE Operation
or Quick Flag Changes Resynchronization
4731 - IMAP4 Extension to SEARCH Command for Controlling
What Kind of Information Is Returned
+ 4959 - IMAP Extension for Simple Authentication and Security Layer (SASL)
+ Initial Client Response
+ 4978 - The IMAP COMPRESS Extension
5032 - WITHIN Search Extension to the IMAP Protocol
5162 - IMAP4 Extensions for Quick Mailbox Resynchronization
5182 - IMAP Extension for Referencing the Last SEARCH Result
+ 5255 - IMAP Internationalization
5256 - IMAP SORT and THREAD Extensions
5258 - IMAP4 - LIST Command Extensions
+ 5267 - Contexts for IMAP4
5530 - IMAP Response Codes
Contact info