POP3

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 10.10.10.17 110
+OK Dovecot ready.
USER orestis
+OK
PASS kHGuERB29DNiNE
+OK Logged in
  • USER <username>
  • PASS <password>

Listing and Accessing the emails

LIST
+OK 2 messages:
1 977
2 514
.
RETR 1
+OK 977 octets
<snip>
  • LIST -> Lists the available emails with the index
  • RETR <no> -> Access the email contents