KMail is the email component of Kontact, the integrated personal information manager from KDE. Developed by KDE
License: Open Source
Kontact - KMail is an open-source email client that emphasizes customization and integration with other applications, while The Bat! focuses on powerful filtering and advanced security features. Both have their strengths and weaknesses depending on user needs, with KMail being more suitable for those who prefer open-source solutions and The Bat! catering to users seeking robust email management and security.