diff --git a/lib/postman-rails.rb b/lib/postman-rails.rb
new file mode 100644
index 0000000..8e152ed
--- /dev/null
+++ b/lib/postman-rails.rb
@@ -0,0 +1,6 @@
+require 'postman'
+require 'postman/rails/action_mailer_delivery_method'
+
+if defined?(ActionMailer)
+  ActionMailer::Base.add_delivery_method :postman, Postman::Rails::ActionMailerDeliveryMethod
+end