Port 110; POP3

POP3 (Post Office Protocol 3) is the most used protocol for receiving mail. You cannot send mail with this protocol, only get your mail. For more information see the RFC 1460.

First start a new client. This can be done by clicking on the client button or selecting Sockets and New Client.

Create a connection to your mailserver. Use your providers pop server. Usually this is pop.myprovider.com and connect to port 110. The popserver will respond with a +OK. Now enter USER username, where username is your pop3 username. Then give PASS password. The mailserver will indicate if you are allowed to log in.

When you are logged in, type STAT. The popserver returns the number of messages you have. To get the first message type RETR 1. The message will be send to you, but also stays on the server. To delete a message from the server use DELE 1. This will only be effective when you end your session with QUIT.

Below is an example. S is the server, C is the client.

S: +OK POP3 server ready
C: USER mrose
S: +OK Give password
C: PASS tgwt2
S: +OK mrose's maildrop has 2 messages (320 octets)
C: STAT
S: +OK 2 320
C: RETR 1
S: +OK 120 octets
S: (the POP3 server sends message 1)
S: .
C: DELE 1
S: +OK message 1 deleted
C: RETR 2
S: +OK 200 octets
S: (the POP3 server sends message 2)
S: .
C: DELE 2
S: +OK message 2 deleted
C: QUIT
S: +OK dewey POP3 server signing off (maildrop empty)