| POP, Post Office Protocol |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| 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:
| Command | Description | References |
|---|---|---|
| APOP | Login with MD5 signature. | RFC 1939 |
| AUTH | Authentication request. | RFC 1734, RFC 5034 |
| CAPA | Get a list of capabilities supported by the server. | RFC 2449 |
| DELE | Mark the message as deleted. | RFC 1939 |
| LIST | Get a scan listing of one or all messages. | RFC 1939 |
| NOOP | Return a +OK reply. | RFC 1939 |
| PASS | Cleartext password entry. | RFC 1939 |
| QUIT | Exit session. Remove all deleted messages from the server. | RFC 1939 |
| RETR | Retrieve the message. | RFC 1939 |
| RSET | Remove the deletion marking from all messages. | RFC 1939 |
| STAT | Get the drop listing. | RFC 1939 |
| STLS | Begin a TLS negotiation. | RFC 2595 |
| TOP | Get the top n lines of the message. | RFC 1939 |
| UIDL | Get a unique-id listing for one or all messages. | RFC 1939 |
| USER | Mailbox login. | RFC 1939 |
| XTND | RFC 1082 |
POP replies:
| Reply | Reference |
|---|---|
| +OK | RFC 1939 |
| -ERR | RFC 1939 |
POP capabilities:
| Capability | References |
|---|---|
| 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 |
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 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.
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Description | Glossary | RFCs | Publications | Obsolete RFCs |