rails/actionmailer/CHANGELOG.md

• Add config.action_mailer.deliver_later_queue_name configuration to set the mailer queue name.

  Chris McGrath

• assert_emails in block form use the given number as expected value. This makes the error message much easier to understand.

  Yuji Yaginuma

• Add support for inline images in mailer previews by using an interceptor class to convert cid: urls in image src attributes to data urls.

  Andrew White

• Mailer preview now uses url_for to fix links to emails for apps running on a subdirectory.

  Remo Mueller

• Mailer previews no longer crash when the mail method wasn't called (NullMail).

  Fixes #19849.

  Yves Senn

• Make sure labels and values line up in mailer previews.

  Yves Senn

• Add assert_enqueued_emails and assert_no_enqueued_emails.

  Example:

  def test_emails
    assert_enqueued_emails 2 do
      ContactMailer.welcome.deliver_later
      ContactMailer.welcome.deliver_later
    end
  end
  
  def test_no_emails
    assert_no_enqueued_emails do
      # No emails enqueued here
    end
  end
  

  George Claghorn

• Add _mailer suffix to mailers created via generator, following the same naming convention used in controllers and jobs.

  Carlos Souza

• Remove deprecate *_path helpers in email views.

  Rafael Mendonça França

• Remove deprecated deliver and deliver! methods.

  claudiob

• Template lookup now respects default locale and I18n fallbacks.

  Given the following templates:

  mailer/demo.html.erb
  mailer/demo.en.html.erb
  mailer/demo.pt.html.erb
  

  Before this change, for a locale that doesn't have its associated file, the mailer/demo.html.erb would be rendered even if en was the default locale.

  Now mailer/demo.en.html.erb has precedence over the file without locale.

  Also, it is possible to give a fallback.

  mailer/demo.pt.html.erb
  mailer/demo.pt-BR.html.erb
  

  So if the locale is pt-PT, mailer/demo.pt.html.erb will be rendered given the right I18n fallback configuration.

  Rafael Mendonça França

Please check 4-2-stable for previous changes.