POP3
Introduction
There are 3 different versions of POP, but POP3 is the mostly used one.
POP3 runs on TCP ports 110(unencrypted) and 995(encrypted) by default.
Post Office Protocol (POP) is a protocol that extracts and retrieves email from a remote mail server for access by the host machine.
POP3 provides users the ability to fetch and receive email
POP3 Basic Interaction
openssl s_client -connect <FQDN/IP>:pop3s
Connect to the POP3s service.
hydra -L users.txt -p 'Company01!' -f 10.10.110.20 pop3
Login Bruteforce with Hydra (POP3)
POP3 Commands
USER username
Identifies the user.
PASS password
Authentication of the user using its password.
STAT
Requests the number of saved emails from the server.
LIST
Requests from the server the number and size of all emails.
RETR id
Requests the server to deliver the requested email by ID.
DELE id
Requests the server to delete the requested email by ID.
CAPA
Requests the server to display the server capabilities.
RSET
Requests the server to reset the transmitted information.
QUIT
Closes the connection with the POP3 server.
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