🟢POP3

POP3 Ports

Port Number	Description	Protocol
110	POP3 (Plain Text)	TCP/UDP
995	POP3 over SSL (TLS/SSL)	TCP

Please note that POP3 typically uses TCP (Transmission Control Protocol) for communication, but the table also includes UDP (User Datagram Protocol) as some older implementations might use it. However, UDP is not commonly used for POP3.

The secure version of POP3 (POP3S) utilizes SSL/TLS encryption to protect communications.

POP3 Commands

Command	Description
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.

Scan POP3 with Nmap

sudo nmap 10.129.63.193 -sV -p110,995 -sC

Connect to POP3 Server

curl -k 'pop3://10.129.63.193' --user robin:robin

openssl s_client -connect 10.129.63.193:pop3s

curl -k 'pop3s://10.129.63.193' --user robin:robin

openssl s_client -connect 10.129.63.193:995

Mutt - Command line Email Client

One of the popular and widely used command-line email clients is "mutt." Mutt allows you to read, send, and manage emails directly from the terminal. Here's how you can use mutt to download emails.

sudo apt-get update
sudo apt-get install mutt

vi ~/.muttrc

set from = "[email protected]"
set realname = "Your Name"
set imap_user = "[email protected]"
set imap_pass = "your_gmail_password"
set folder = "imaps://imap.gmail.com/"
set spoolfile = "+INBOX"
set postponed = "+[Gmail]/Drafts"
set header_cache=~/.mutt/cache/headers
set message_cachedir=~/.mutt/cache/bodies
set certificate_file=~/.mutt/certificates
set move = no

mutt

Mutt provides various commands to manage emails.

For example:

• d: Delete the currently selected email.

• s: Save the currently selected email to a mailbox.

• r: Reply to the currently selected email.

• q: Quit mutt.