I'd like to send plain text emails from a Rails app. In my mail sending config I have:
ActionMailer::Base.default_content_type = 'text/plain'
Nonetheless, when I send a test email from the Rails console, I get:
>> GeneralAppMailer.deliver_test
# ...
Content-Type: text/html; charset=utf-8
And looking at it in Gmail, it does seem to be handled as HTML.