KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

Simple Mail is described as 'Mail client for Firefox. It allows you to get notified, read and write messages for multiple email accounts inside Firefox' and is a Email Client in the office & productivity category. There are more than 25 alternatives to Simple Mail for a variety of platforms, including Windows, Mac, Linux, Web-based and Android apps. The best Simple Mail alternative is Thunderbird, which is both free and Open Source. Other great apps like Simple Mail are Evolution, SeaMonkey, Microsoft Outlook and eM Client.
KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.


Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.



The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road.




The Bat! is a secure email client software, built to protect your correspondence against third-parties.




Mail is designed to let you manage your email quickly and effortlessly. Its interface is based on conversations, so you can read an entire discussion without having to click from message to message.

LucaMail is an open source, cross-platform email client. LucaMail is developed to provide cross-platform alternative to Email Clients that are really exists. LucaMail focuses on modern technologies as well as maintaining a user-friendly UI.




Mac IMAP email client featuring keyboard control, Markdown email composition, advanced search capabilities, smart mailboxes, automatic signature handling, cryptographic options with OpenPGP/S-MIME, tagging, multiple notifications, and customizable layouts including widescreen.




Scribe is a small portable email client with an intergrated contact database and calendar. It supports all the major internet mail protocols and uses international standards where possible. Scribe doesn't required installing or uninstalled and can be used from a removable...




Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact- list management, custom code insertion via a hook system, and more.

Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards compliant components from the Horde Project.


Horde is the most popular Self-Hosted alternative to Simple Mail.
Alpine is a fast, easy to use email client for the command line that is suitable for both the inexperienced email user as well as for the most demanding of power users. Alpine is based on the Pine® Message System (http://www.washington.
