helo

Install command: 
brew install --cask helo

Name: HELO

Email tester and debugger

https://usehelo.com/

Cask JSON API: /api/cask/helo.json

Cask code: helo.rb on GitHub

Current version: 1.7.0

Current version requires: macOS >= 10.11

Versions:

Intel sequoia 1.7.0
sonoma 1.7.0
ventura 1.7.0
monterey 1.7.0
big sur 1.7.0
catalina 1.7.0
mojave 1.7.0
high sierra 1.7.0
sierra 1.7.0
el capitan 1.7.0

Analytics:

Installs (30 days)
helo 7
Installs (90 days)
helo 35
Installs (365 days)
helo 187
Fork me on GitHub