Log message:
mail/ruby-actionmailbox70: add package version 7.0.0

Action Mailbox

Action Mailbox routes incoming emails to controller-like mailboxes for
processing in Rails.  It ships with ingresses for Mailgun, Mandrill,
Postmark, and SendGrid.  You can also handle inbound mails directly via the
built-in Exim, Postfix, and Qmail ingresses.

The inbound emails are turned into `InboundEmail` records using Active
Record and feature lifecycle tracking, storage of the original email on
cloud storage via Active Storage, and responsible data handling with
on-by-default incineration.

These inbound emails are routed asynchronously using Active Job to one or
several dedicated mailboxes, which are capable of interacting directly with
the rest of your domain model.

This is for Ruby on Rails 7.0.