Port 110 - pop

Post Office Protocol (POP) is a type of computer networking and Internet standard protocol that extracts and retrieves email from a remote mail server for access by the host machine

Enumeration

nmap -p110 -sS -sC -sV $(target)

Banner

nc -nv $(target) 110

Nmap

nmap --script "pop3-capabilities" -sV -p110 $(target)
nmap --script "pop3-ntlm-info" -sV -p110 $(target)