ruby-actionmailer binary package in Ubuntu Trusty arm64

 Action Mailer is a framework for designing email-service layers. These layers
 are used to consolidate code for sending out forgotten passwords, welcome
 wishes on signup, invoices for billing, and any other use case that requires
 a written notification to either a person or another system.
 .
 This is empty dependency package which depends on the default Debian
 version of rails framework. If you need to depend on a specific version
 of rails, you need to depend on <package>-VERSION package.

Source package