POP3 service is a email receiving service. So every messages which is received will be available in the POP3 service. Detailed and technical explanation at wikipedia

Requires: valid credenials of the user is required to enumerate information from this port

Connecting to the service

telnet 110
+OK Dovecot ready.
USER orestis
PASS kHGuERB29DNiNE                                    
+OK Logged in
  • USER <username>

  • PASS <password>

Listing and Accessing the emails

+OK 2 messages:                                                                                                                       
1 977                                                                                                                                 
2 514                                                                                                                                 
RETR 1                                                                                                                                
+OK 977 octets 
  • LIST -> Lists the available emails with the index

  • RETR <no> -> Access the email contents

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