Mailspring Alternatives for Linux
There are many alternatives to Mailspring for Linux if you are looking to replace it. The most popular Linux alternative is 
Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Mailspring and ten of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Mailspring are 
Evolution (Free, Open Source), 
Geary (Free, Open Source), 
Kontact - KMail (Free, Open Source) and 
Shift (Freemium).
- Shift is an email client that makes navigating between Mail, Calendar, Drive + your favorite Apps & Extensions easy (for Gmail, Outlook.com - Office 365 & Hotmail).
Shift
Sponsored - Free email application that’s easy to set up and customize - and it’s loaded with great features!.
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
- PortableApps.com
- Haiku
- Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.
- Free • Open Source
- Linux
- BSD
- S/MIME
- GNOME
- OpenPGP
- Geary is an email application built around conversations, for the GNOME 3 desktop.
- Free • Open Source
- Linux
- Chrome OS
- BSD
- GNOME
- 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.
- Shift is an email client that makes navigating between Mail, Calendar, Drive + your favorite Apps & Extensions easy (for Gmail, Outlook.com - Office 365 & Hotmail).
- Work quickly & seamlessly on the web. WB brings your favorite webmail, websites & web apps together in one organized place. Log in to multiple accounts using cookie profiles. Built on Chromium, fast & secure.
- Pantheon Mail is a free open source email client forked by the elementary OS community from Geary .
- Nylas Mail Lives is a fork of Nylas Mail.
Discontinued
On its github page it states it is archived and is no longer maintained.
- Free • Open Source
- Mac
- Windows
- Linux
- Self-Hosted