I\'m using Rails 3.1. I\'m trying to figure this out, and to my surprise, it is starting to seem that rails does not come with this method at all. Maybe im wrong.
Ca
For Rails 4, and maybe earlier, use:
config.action_mailer.asset_host = 'https://assets.com'
per https://github.com/fphilipe/premailer-rails/issues/16