Eudora is an email program produced by Qualcomm that is based on the open source Thunderbird client from Mozilla. Eudora portable is a reworked Thunderbird email client with a portable wrapper. The software utilizes a penelope news and mail extension or addon and comes packed with many features users might find in the Thunderbird mail client.
Pop Peeper is a freeware email client and notifier that can be run portably from a USB device. This portable Email Software can automatically import your current email accounts from Outlook Express or Windows Mail and can also be used with your GMail, Hotmail, LiveMail, MSN, Yahoo, GMail, Mail, MyWay, Excite, iWon, Lycos, RediffMail, Juno and NetZero accounts.
Quick Mailer (QM) is a Tiny Free Portable eMail Client. The eMail Tool is super tiny, fast and easy to use. Quick Mailer does allow attachments to be added to the messages as well. This tiny email client is perfect for situations where you just want to send messages or files without launching and setting up a large email client like outlook express.
Mini Relay Server is a free portable SMTP server that runs locally on your computer and acts as your own personal mail relay. Once launched, it listens on localhost and allows you to send outgoing email directly to recipient mail servers without relying on your Internet Service Provider SMTP server.