Laserfiche's POP3 connector implements a transport channel that  lets your Mule application retrieve email from a POP3 email server. The connector is configurable only as an inbound endpoint, that is, as a message source with a one-way exchange pattern.POP3 is similar to IMAP, except IMAP supports both online and offline modes. For instance, IMAP users can leave email messages on the IMAP server until they explicitly delete them. Like IMAP, POP3 cannot send email; for that, you must implement an SMTP outbound endpoint.