POP3

Port 110

POP3 Reference

Port 110

Overview

POP3 (Post Office Protocol version 3) is used for retrieving emails from a mail server. It operates on port 110 and downloads messages to the client.

Commands

USER USER <username>

Specifies the username for authentication

USER user
PASS PASS <password>

Specifies the password for authentication

PASS password
STAT STAT

Returns mailbox status (message count and total size)

STAT
LIST LIST [msg]

Lists messages with their sizes

LISTLIST 1
RETR RETR <msg>

Retrieves a message by number

RETR 1
DELE DELE <msg>

Marks a message for deletion

DELE 1
TOP TOP <msg> <n>

Gets message headers and first n lines of body

TOP 1 10
UIDL UIDL [msg]

Returns unique ID for messages

UIDLUIDL 1
RSET RSET

Resets deletion marks

RSET
NOOP NOOP

No operation - keeps connection alive

NOOP
QUIT QUIT

Ends the session and applies deletions

QUIT
HELP HELP [command]

Shows available commands

HELPHELP RETR

Tips

  • Type help or ? for command list
  • Type help <command> for details
  • Press Ctrl+L to clear terminal

Further Reading

RFC 1939 - Post Office Protocol - Version 3 ↗