1)   Mahogany mail and news client 66
A GUI email and news client using the wxWindows cross-platform framework and featuring IMAP, POP3, SMTP, and NNTP support, SSL, a powerful address database, Python scripting, filtering, and a PalmOS synchronisation module.
email, mail, mail client, free, pop3, smtp, news, news client, nttp,

 2)   Columba 0
Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
email, mail, mail client, free, pop3, smtp, news, news client, nttp,