This module defines a class, POP3, which encapsulates a
connection to an POP3 server and implements the protocol as defined in
RFC 1725. The POP3 class supports both the minimal and
optional command sets.
Note that POP3, though widely supported, is obsolescent. The
implementation quality of POP3 servers varies widely, and too many are
quite poor. If your mailserver supports IMAP, you would be better off
using the imaplib.IMAP4 class, as IMAP
servers tend to be better implemented.