Asroc

See also: POP

POP3 , or Post Office Protocol Version 3 (literally protocol of the post office, version 3 ), is a protocol which makes it possible to recover the emails located on a electronic Mail server.

This operation requires a connection to a network TCP/IP. The port used is the 110. This protocol was defined in the RFC 1939.

POP3S (POP3 over SSL) uses SSL to make safe the communication with the waiter, as described in the RFC 2595. POP3S uses the port 995.

Orders

To recover the emails, one can:
  • is to use a customer email, which does it automatically and which hides the orders.
  • is directly to use orders POP3 in an interactive way.

Here an example of connection of protocol POP3 on a Interpreter of orders:

First of all, it is necessary to connect to the waiter

  • telnet nom_du_servor 110
  • Exemple: telnet mail.altern.org 110

Then, it is necessary to be identified and to authenticate

  • TO USE nom_de_votre_compte (generally, which is before “@” of the Email address)
  • NOT mot_de_passe (the password to reach the box of mail)

Then, it is possible to use one of following orders POP3.

Principal orders

  • OF the numéro_du_message : erase the message specified
  • LIST: give a list of the messages as well as the size of each message: a number followed by the size in bytes.
  • RETR numéro_du_message : recover the message indicated
  • STAT: indicate the number of messages and the size occupied by the whole of the messages
  • SIGNAL numéro_du_message nombre_de_lignes : post the first lines of the message.

Other orders POP3

  • APOP : allows a protected authentification (the password does not forward in light)
  • NOOP: nothing to make, just to keep carrying the
  • QUIT: to leave the session in progress
  • RSET: re-initialized completely the session
  • UIDL: post (for only one or all the messages) a single identifier which does not vary between each session

Example of dialog

S: C: S: +OK POP3 server ready <1896.697170952@dbc.mtview.ca.us> C: APOP mrose c4c9334bac560ecc979e58001b3e22fb S: +OK mrose' S maildrop has 2 messages (320 bytes) C: STAT S: +OK 2.320 C: LIST S: +OK 2 messages (320 bytes) S: 1.120 S: 2.200 S: . C: RETR 1 S: +OK 120 octets S: S: . C: OF the 1 S: +OK message 1 deleted C: RETR 2 S: +OK 200 octets S: S: . C: OF the 2 S: +OK message 2 deleted C: QUIT S: +OK dewey POP3 server signing off (maildrop empty) C: S: Certain old waiters POP3 without APOP accept a login TO USE and NOT in light:

C: TO USE mrose S +OK To use accepted C: NOT mrosepass S +OK Not accepted

Related articles

See too

; Internal bonds

; External bonds

  • RFC 1939 (in) - specifications of the POP protocol version 3
  • RFC 2595 (in) - use of TLS (SSL) with protocols POP3 and IMAP4
  • protocol POP3 (Fr)

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