Using Action Mailbox in Rails 6 to Receive Mail

Sending mail from a Rails application has been covered by hundreds or thousands of articles, however, there is not a ton of articles about receiving, parsing and using the new ActionMailbox.The following is an excerpt from my book Build A SaaS App in Rails 6 and is used in a new product I am building Mail Buffer. Thus, I am standing by the tutorial here with real world usage!Lastly, as this is an excerpt, this takes into account the chapter leading up to this section where the reader will have created an application, models for a Standup, Todo/Did/Blockers (which are Tasks) and a few mailers for outgoing mail.The following is an excerpt from my book Build A SaaS App in Rails 6 and is used in a new product I am.