deepakdargade · August 2, 2013 21:12 · Jun 1, 2013
diff --git a/emails.rake b/emails.rake
@@ -0,0 +1,27 @@
+ desc "Log in to the Gmail account and cleanse anyone who appears to have bounced"
+  task :handle_bounces => :environment do
+    require 'gmail'
+    # Open a connection using your default smtp settings, could also define via YML or inline
+    gmail = Gmail.connect!(ActionMailer::Base.smtp_settings[:user_name], ActionMailer::Base.smtp_settings[:password])
+      # Find everything from the Gmail mailer daemon (unread only)
+      emails = gmail.inbox.emails(:unread, :from => "[email protected]", :subject => "Delivery Status Notification (Failure)")
+      Rails.logger.info("Found #{emails.length} messages")
+      emails.each do |email|
+        # Gmail sets a header "X-Failed-Recipients", with each email that failed
+        if !email.header["X-Failed-Recipients"].blank?
+          bad_addresses = email.header["X-Failed-Recipients"].value.split(",")
+          bad_addresses.each do |bad_addr|
+            Rails.logger.info("looking for user with email: #{bad_addr}")
+            # We assume you have a user model, but could also do whatever you want with the bad address here
+            user = User.find_by_email(bad_addr)
+            if user
+              Rails.logger.info("Found: #{user.name}, resetting email address")
+              user.email = nil # Reset the email, might vary for your use case
+              user.save
+            end
+          end # close emails form header
+          email.read! # Mark as read so we don't try to deal with it again next time
+        end
+      end # next email
+    gmail.logout # done!
+  end