add class which extends the behaviour of MailDeliveryJob by recording…

… information in the MailDeliveryFailure table

app/jobs/log_mail_delivery_failure_job.rb

@@ -0,0 +1,18 @@
+class LogMailDeliveryFailureJob < ActionMailer::MailDeliveryJob
+    def perform(*args)
+      super 
+    rescue => e
+
+      record_failure(*args)
+    end
+
+    private
+
+    def record_failure(*args)
+      MailDeliveryFailure.create(
+        email_address: 
+        mailer_class: 
+        mailer_action_method: 
+      )
+    end
+  end