TrulyMail

TrulyMail is a multiple email management program for those users who have to frequently sign in to multiple email accounts.

Apple Mail

There’s big news attached.

Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response

Clyton is an email client with advanced security and spam filtering features.

Apps/Evolution - GNOME Wiki!

Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.

GyazMail is an advanced level of an email account management system for the Mac OS X operating system users.

Email client by KDE, supporting POP3 and IMAP mailboxes.

MailWise is an email security solution for businesses.

Mailbird is the best email client for Windows 7, 8 and 10

Mail and Calendar apps already built in Windows 10.

NeoMutt is a command-line mail reader. It’s a version of https://alternativeto.

í ½í² Mail app for Nextcloud

Pegasus Mail has been in existence longer than any other PC email client.

Portable DreamMail is a featured rich email client that lets its client to get their multiple email accounts managed at a centralized place.

The Power Email App for busy professionals, like you.

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

eM Client is a Windows-based email client for sending and receiving emails, and managing calendars, contacts and tasks.

A fully fledged, free email server solution, an open source project (GPL v2).

nPOPuk is an ultra-small, but comprehensive, e-mail client that runs on a wide range of…