Roundcube

This tool is a free license and open source webmail solution with lots of features and very user friendly. You can access to this webmail solution trhu every internet browser.

Some main features are:

  • Drag-&-drop message management
  • Full support for MIME and HTML messages
  • Multiple sender identities
  • Full featured address book with groups and LDAP connectors
  • Threaded message listing

The user interface is available in 80 languages, light and dark themes and a three column view, that makes this tool very understandable and easy to use.

https://roundcube.net/