A new version of Maily (https://github.com/markets/maily) v0.9.0 has been published 🚀. Mainly, includes a new feature to simplify integration with emails from other gems. Example, with Devise:

Maily.hooks_for('Devise::Mailer') do |mailer|
  mailer.hide_email(:unlock_instructions)
  mailer.register_hook(:reset_password_instructions, user, 'random_token')
end

• Changelog: https://github.com/markets/maily/blob/master/CHANGELOG.md
• RubyGems: https://rubygems.org/gems/maily/versions/0.9.0