This command line tool helps you send newsletters.
Install it first:
gem install rumble
Run it locally and read its output:
rumble --help
Simple liquid letter looks like this:
{{ first }},
How are you?
Best,
Yegor
The list of emails must contain three columns separated by a comma: first name, last name, and email.
You can't send via HTTP/SMTP proxy, unfortunately (you are welcome to submit a pull request).
Read these guidelines. Make sure you build is green before you contribute your pull request. You will need to have Ruby 2.3+ and Bundler installed. Then:
bundle update
bundle exec rake
If it's clean and you don't see any error messages, submit your pull request.