Open Source Mail Clients in Java

Mozilla Java mail/news reader (Xena era). Three-pane GUI; POP3, IMAP, local mbox; MIME parser. Source released; influential threading algorithm (RFC 5256).

Java email client with GUI, wizards and i18n. MPL; powerful mail management; last update 2016.

Java email client using JavaMail. IMAP (connected/disconnected) and POP3; SMTP for sending. Web Start and jar builds; GPL.