POP, Post Office Protocol

Description Glossary RFCs Publications Obsolete RFCs

Description:

Protocol suite: TCP/IP.
Protocol type:Application layer email access protocol.
Ports:109 (TCP), version 2; 110 (TCP), version 3.
URI:pop:
SNMP MIBs:
Working groups: pop, Post Office Protocol.
Links: POP3 extension mechanism.

MAC header IP header TCP header POP message

POP commands:

CommandDescriptionReferences
APOPLogin with MD5 signature. RFC 1939
AUTHAuthentication request. RFC 1734, RFC 5034
CAPAGet a list of capabilities supported by the server. RFC 2449
DELEMark the message as deleted. RFC 1939
LISTGet a scan listing of one or all messages. RFC 1939
NOOPReturn a +OK reply. RFC 1939
PASSCleartext password entry. RFC 1939
QUITExit session.
Remove all deleted messages from the server.
RFC 1939
RETRRetrieve the message. RFC 1939
RSETRemove the deletion marking from all messages. RFC 1939
STATGet the drop listing. RFC 1939
STLSBegin a TLS negotiation. RFC 2595
TOPGet the top n lines of the message. RFC 1939
UIDLGet a unique-id listing for one or all messages. RFC 1939
USERMailbox login. RFC 1939
XTND  RFC 1082

POP replies:

ReplyReference
+OK RFC 1939
-ERR RFC 1939

POP capabilities:

CapabilityReferences
AUTH-RESP-CODE RFC 3206
EXPIRE RFC 2449
IMPLEMENTATION RFC 2449
LOGIN-DELAY RFC 2449
PIPELINING RFC 2449
RESP-CODES RFC 2449
SASL RFC 2449
TOP RFC 2449
UIDL RFC 2449
USER RFC 2449

Glossary:


RFCs:

[RFC 937] POST OFFICE PROTOCOL - VERSION 2.

[RFC 1082] Post Office Protocol - Version 3 Extended Service Offerings.

[RFC 1734] POP3 AUTHentication command.

[RFC 1939] Post Office Protocol - Version 3.

[RFC 1957] Some Observations on Implementations of the Post Office Protocol (POP3).

[RFC 2384] POP URL Scheme.

[RFC 2449] POP3 Extension Mechanism.

[RFC 2595] Using TLS with IMAP, POP3 and ACAP.

[RFC 3206] The SYS and AUTH POP Response Codes.

[RFC 6186] Use of SRV Records for Locating Email Submission/Access Services.


Publications:


Obsolete RFCs:

[RFC 918] POST OFFICE PROTOCOL.

[RFC 1081] Post Office Protocol - Version 3.

[RFC 1225] Post Office Protocol - Version 3.

[RFC 1460] Post Office Protocol - Version 3.

[RFC 1725] Post Office Protocol - Version 3.


Description Glossary RFCs Publications Obsolete RFCs