Fetchmail is a full-featured IMAP/POP2/POP3/APOP/KPOP client with easy
configuration, daemon mode, forwarding via SMTP or local MDA, superior
reply handling. Not a mail user agent, rather a pipe-fitting that
seamlessly forwards fetched mail to your local delivery system. Your
one-stop solution for intermittent email connections. This is the
lineal descendant of and replacement for the old popclient program.

Homepage:
https://www.fetchmail.info/
