12. IANA Considerations

and IMAP2bis", RFC 1732, December 1994.

[IMAP-OBSOLETE] Crispin, M., "Internet Message Access Protocol

• Obsolete Syntax", RFC 2062, December 1996.

[IMAP2] Crispin, M., "Interactive Mail Access Protocol

• Version 2", RFC 1176, August 1990.

[RFC-822] Crocker, D., "Standard for the Format of ARPA Internet Text Messages", STD 11, RFC 822, August 1982.

[RFC-821] Postel, J., "Simple Mail Transfer Protocol", STD 10, RFC 821, August 1982.

B. Changes from RFC 2060

1. Clarify description of unique identifiers and their semantics.

2. Fix the SELECT description to clarify that UIDVALIDITY is required in the SELECT and EXAMINE responses.

3. Added an example of a failing search.

4. Correct store-att-flags: "#flag" should be "1#flag".

5. Made search and section rules clearer.

6. Correct the STORE example.

7. Correct "BASE645" misspelling.

8. Remove extraneous close parenthesis in example of two-part message with text and BASE64 attachment.

RFC 3501 IMAPv4 March 2003

9. Remove obsolete "MAILBOX" response from mailbox-data.

10. A spurious "<" in the rule for mailbox-data was removed.

11. Add CRLF to continue-req.

12. Specifically exclude "]" from the atom in resp-text-code.

13. Clarify that clients and servers should adhere strictly to the protocol syntax.

14. Emphasize in 5.2 that EXISTS can not be used to shrink a mailbox.

15. Add NEWNAME to resp-text-code.

16. Clarify that the empty string, not NIL, is used as arguments to LIST.

17. Clarify that NIL can be returned as a hierarchy delimiter for the empty string mailbox name argument if the mailbox namespace is flat.

18. Clarify that addr-mailbox and addr-name have RFC-2822 quoting removed.

19. Update UTF-7 reference.

20. Fix example in 6.3.11.

21. Clarify that non-existent UIDs are ignored.

22. Update DISPOSITION reference.

23. Expand state diagram.

24. Clarify that partial fetch responses are only returned in