IMAP, Interactive Mail Access Protocol （1）

http://www.networksorcery.com/enp/protocol/imap.htm Description: Protocol suite: TCP/IP. Protocol type: Application layer email protocol. Ports: 143 (TCP) IMAP2, IMAP4, IMAP 4rev1. 220 (TCP) IMAP3. URI: imap: MIME subtype: SNMP MIBs: Worki

http://www.networksorcery.com/enp/protocol/imap.htm

Description:

Protocol suite:	TCP/IP.
Protocol type:	Application layer email protocol.
Ports:	143 (TCP) IMAP2, IMAP4, IMAP 4rev1. 220 (TCP) IMAP3.
URI:	imap:
MIME subtype:
SNMP MIBs:
Working groups:	imap, Internet Message Access Protocol. imapext, Internet Message Access Protocol Extension. morg, Message ORGanization.
Links:	IANA: IMAP4 capabilities. wiki: IMAP.

IMAP2:

IMAP3:

IMAP4:

IMAP4rev1:

This variant is designed to be upwards compatible from the IMAP2 and unpublished IMAP2bis protocols. It is largely compatible with the IMAP4 protocol.

---

MAC header

IP header

TCP header

IMAP message

Commands:

Command	References
APPEND	RFC 3501, RFC 3502, RFC 4466, RFC 4469
AUTHENTICATE	RFC 3501
CAPABILITY	RFC 3501
CHECK	RFC 3501
CLOSE	RFC 3501
COMPARATOR	RFC 5255
COMPRESS	RFC 4978
CONVERSIONS	RFC 5259
COPY	RFC 3501
CREATE	RFC 3501, RFC 4466
DELETE	RFC 3501
DELETEACL	RFC 4314
EXAMINE	RFC 3501, RFC 4466
EXPUNGE	RFC 3501
FETCH	RFC 3501, RFC 4466
GETACL	RFC 4314
GETQUOTA	RFC 2087
GETQUOTAROOT	RFC 2087
LIST	RFC 3501
LISTRIGHTS	RFC 4314
LOGIN	RFC 3501
LOGOUT	RFC 3501
LSUB	RFC 3501
MYRIGHTS	RFC 4314
NOOP	RFC 3501
RENAME	RFC 3501, RFC 4466
SEARCH	RFC 3501, RFC 5032
SELECT	RFC 3501, RFC 4466
SETACL	RFC 4314
SETQUOTA	RFC 2087
SORT	RFC 5256
STARTTLS	RFC 3501
STATUS	RFC 3501
STORE	RFC 3501, RFC 4466
SUBSCRIBE	RFC 3501
THREAD	RFC 5256
UID	RFC 3501, RFC 4315, RFC 4466
UNSELECT	RFC 3691
UNSUBSCRIBE	RFC 3501
X	RFC 3501

---

Status responses:
Status responses MAY include an OPTIONAL response code. A response code consists of data inside square brackets in the form of an atom, possibly followed by a space and arguments. The response code contains additional information or status codes for client software beyond the OK/NO/BAD condition, and are defined when there is a specific action that a client can take based upon the additional information.

Response	Reference
BAD	RFC 3501
BYE	RFC 3501
NO	RFC 3501
OK	RFC 3501
PREAUTH	RFC 3501

---

IMAP4 capabilities:

Capability	References
ACL	RFC 4314
ANNOTATE-EXPERIMENT-1	RFC 5257
BINARY	RFC 3516
CATENATE	RFC 4469
CHILDREN	RFC 3348
COMPRESS=DEFLATE	RFC 4978
CONDSTORE	RFC 4551
CONTEXT=SEARCH	RFC 5267
CONTEXT=SORT	RFC 5267
CONVERT	RFC 5259
ENABLE	RFC 5161
ESEARCH	RFC 4466, RFC 4731
ESORT	RFC 5267
FILTERS	RFC 5466
I18NLEVEL=1	RFC 5255
I18NLEVEL=2	RFC 5255
ID	RFC 2971
IDLE	RFC 2177
LANGUAGE	RFC 5255
LITERAL+	RFC 2088
LOGIN-REFERRALS	RFC 2221
LOGINDISABLED	RFC 2595, RFC 3501
MAILBOX-REFERRALS	RFC 2193
MULTIAPPEND	RFC 3502
NAMESPACE	RFC 2342
NOTIFY	RFC 5465
QRESYNC	RFC 5162
QUOTA	RFC 2087
RIGHTS=	RFC 4314
SASL-IR	RFC 4959
SEARCHRES	RFC 5182
SORT	RFC 5256
STARTTLS	RFC 2595, RFC 3501
THREAD	RFC 5256
UIDPLUS	RFC 2359
UNSELECT	RFC 3691
URLAUTH	RFC 4467
WITHIN	RFC 5032