397 Rails: Sending e-mail [2d]

Research

• Action Mailer Basics Show archive.org snapshot and Previews
• Chapter "Task H1: Sending Confirmation Emails" from Agile Web Development with Rails Show archive.org snapshot (in our library)
• Ensure that the receiving e-mail is valid
  • Using the Truemail gem to validate e-mail addresses
• Ensure that development and staging are not sending out e-mails by accident
  • Rails: How to write custom email interceptors
  • Check if you have a local mail server listening
• Ensure that e-mail arrives at the inbox without being blocked
  • Read about "E-mail deliverability"
  • Skim over Kim's slides about sending mails from linux Show archive.org snapshot
• Learn how we can implement basic e-mail styling (not required for the exercises below)
  • Watch the talk " HTML E-Mails mit MJML 🔒 Show archive.org snapshot " (slides)
  • Visit Can I Email Show archive.org snapshot . Can you use flex styles in E-Mails? border-radius? Ancient <table> layouts?

Exercises

• In MovieDB, if you did not implement sending a welcome e-mail, send an e-mail now.
• In MovieDB, whenever someone creates a movie, send a notification to moviedb-admin@example.com.
  • Can you attach the movie's poster as a file attachment to the e-mail?
  • Can you write a RSpec test for this?
• In the lesson Form Models we said that we don't like to send e-mails in core model callbacks. We would much rather send e-mails from form model callbacks. Why is that?
  • Make sure that MovieDB does not send e-mails from your Movie model, but from a form model like Movie::Form.

Hint

Action Mailer has a delivery method like :smtp or :sendmail which can be different for each environment. For the test environment the delivery method is set to :test, which means that new e-mails are stored as objects in the ActionMailer::Base.deliveries array. You can inspect this array in your tests.

Discuss

With your mentor, discuss the challenges of implementing HTML mails well.