Which email client was developed by the KDE project?

Which email client was developed by the KDE project? KMail was developed by KDE.

KMail is KDE’s dedicated email application and is also available as the mail component of Kontact, KDE’s broader personal-information-management suite. It is designed for desktop Linux and other platforms supported by KDE software, using Qt for its graphical interface.

KMail supports common mail protocols including IMAP and POP3 for receiving messages and SMTP for sending them. It also integrates with open standards and tools for message signing and encryption, including OpenPGP and S/MIME. Its KDE integration lets it share address-book and other personal-data services with related applications.

A common mix-up is confusing KMail with the entire Kontact suite: Kontact is the container and organizer, while KMail is the email client inside it. KMail is also distinct from KDE’s mail-transfer infrastructure; it is an end-user application, not a server protocol such as SMTP or LMTP.