Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Mailtrim - Email lives forever!. Reinvigorate your emailing experience with the best free email client, the Mailtrim
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Loop Email - Emailing for teams: Organize your Inbox into channels 💌
Mailspring - Mailspring is a mail client for Mac, Windows and Linux.
Missive - Team communication app now supporting FB, Twitter & SMS