Eudora is an e-mail client used on the Microsoft Windows and Macintosh operating systems.Eudora was developed by Steve Dorner in 1988 as a part of his studies at the University of Illinois at Urbana-Champaign and was acquired by Qualcomm in 1991.
Eudora pioneered the concept of a folder list pane that was always present. Originally distributed freely it was commercialized and offered in both a Light (freeware) and Pro (commercial) product, it is now distributed with three modes: adware, payware (removes ads), and the classic Light mode.
Eudora (6.0.1) added support for Bayesian filtering of spam with a feature called SpamWatch. Eudora (6.2) added a scam watch feature that flags suspicious links within e-mails in an attempt to thwart phishing.
Eudora has support for "Stationery", that is a standard reply that is prepared ahead of time to a common question. Eudora stores e-mails in text files, rather than in a database like Microsoft Outlook, allowing the user to back up portions of their e-mail correspondence without backing up the entire database.
Eudora supports the POP3, IMAP and SMTP protocols.
Eudora is property of Qualcomm Incorporated.