An email client (and news reader) with plugin mechanism.

A text-based mail client and a simple newsreader. Handles multiple POP3, IMAP accounts, and local mail folders.

Enables using third party e-mail programs to receive or send AOL mail.

A lightweight cross platform email client, supporting POP3, IMAP4 (fetch), [E]SMTP, SOCKS5, and MIME with an integrated contact database and calendar.

An open-source cross-platform mail and news client available for X11/Unix and MS Win32 platforms, supporting SMTP, POP3, IMAP, NNTP, and full MIME support.

Open-source email and calendar client. Strong on IMAP4 handling. Windows, Linux, Mac OSX.

An SMTP component written in C#. Allows developers to use SMTP servers other than MS SMTP and has a web service that allows the sending of email via HTTP/SOAP. [BSD License.] Windows only.

A new mailer for the Amiga platform (both classic and OS4) and compatible systems (MorphOS).