mailspring

Install command: 
brew install --cask mailspring

Name: Mailspring

Fork of Nylas Mail

https://getmailspring.com/

/api/cask/mailspring.json (JSON API)

Cask code on GitHub

Current version: 1.14.0

Requires: macOS >= 10.15

Variations:

Intel sequoia 1.14.0
sonoma 1.14.0
ventura 1.14.0
monterey 1.14.0
big sur 1.14.0
catalina 1.14.0

Analytics:

Installs (30 days)
mailspring 40
Installs (90 days)
mailspring 169
Installs (365 days)
mailspring 701
Fork me on GitHub