mpop is a POP3 client: it retrieves mail from POP3 mailboxes.

Features include:

- Support for multiple accounts
- Header based mail filtering: filter junk mail before downloading it
- Delivery to mbox files, maildir folders, or a mail delivery agent (MDA)
- TLS support including client certificates
- Many authentication methods
- Support for Internationalized Domain Names (IDN)
- Fast POP3 implementation using command pipelining
- SOCKS proxy support

Homepage:
https://marlam.de/mpop/
