#!/usr/bin/env python3
import poplib, email
server = 'my.server.domain'
port = "110"
login = 'mylogin'
password = 'mypassword'	
pop_conn = poplib.POP3(server, port)
pop_conn.user(login)
pop_conn.pass_(password)
messages = [pop_conn.retr(i) for i in range(1, len(pop_conn.list()[1]) + 1)]
messages = ['\n'.join(str(mssg[1])) for mssg in messages]
messages = [email.parser.Parser().parsestr(mssg) for mssg in messages]
pop_conn.quit()

import poplib, email, email.parser