Sending a responsive email template and
Need to watch https://www.driftingruby.com/episodes/mail-previews-and-templates
Get some template here http://foundation.zurb.com/emails/email-templates.html
add this in your gem file
gem 'premailer-rails'
gem 'postmark-rails', '~> 0.15.0'
To make the postmark use environment variables please follow this steps
Comment out the default "from:"...