IMAP4 Capabilities Registry (RFC2060) Capability names MUST either begin with "X" or be standard or standards-track IMAP4rev1 extensions, revisions, or amendments registered with IANA. A server MUST NOT offer unregistered or non-standard capability names, unless such names are prefixed with an "X". Client implementations SHOULD NOT require any capability name other than "IMAP4rev1", and MUST ignore any unknown capability names. Capability Name Reference --------------- --------- ACL [RFC2086] IDLE [RFC2177] LITERAL+ [RFC2088] LOGIN-REFERRALS [RFC2221] MAILBOX-REFERRALS [RFC2193] NAMESPACE [RFC2342] QUOTA [RFC2087] UIDPLUS [RFC2359] STARTTLS [RFC2595] LOGINDISABLED [RFC2595] ID [RFC2971] References ---------- [RFC2060], Crispin, M., "Internet Message Access Protocol Version 4rev1", RFC 2060, December 1996. [RFC2086] Myers, J., "IMAP4 ACL extension", Carnegie Mellon, January 1997. [RFC2087] Myers, J., "IMAP4 QUOTA extension", Carnegie Mellon, January 1997. [RFC2088] Myers, J., "IMAP4 non-synchronizing literals", Carnegie Mellon, January 1997. [RFC2177] Leiba, B., "IMAP4 IDLE command", IBM T.J. Watson Research Center, June 1997. [RFC2193] Gahrns, M., "IMAP4 Mailbox Referrals", Microsoft, September 1997. [RFC2221] Gahrns, M., "IMAP4 Login Referrals", Microsoft, October 1997. [RFC2342] Gahrns, M., Newman, C., "IMAP4 Namespace", Microsoft, Innosoft, May 1998. [RFC2359] Myers, J., "IMAP4 UIDPLUS extension", Netscape Communications, June 1998. [RFC2595] Newman, C., "Using TLS with IMAP, POP3 and ACAP", RFC 2595, Innosoft, June 1999. [RFC2971] Showalter, T. "IMAP4 ID extension", RFC 2971, October 2000. []