2 files changed, 35 insertions, 2 deletions
diff --git a/lib/action_mailroom/mailbox.rb b/lib/action_mailroom/mailbox.rb
index 44dcd691b1..0d03f4be6b 100644
--- a/lib/action_mailroom/mailbox.rb
+++ b/lib/action_mailroom/mailbox.rb
@@ -1,7 +1,8 @@
 require "active_support/rescuable"
+require "action_mailroom/mailbox/callbacks"
 
 class ActionMailroom::Mailbox
-  include ActiveSupport::Rescuable
+  include ActiveSupport::Rescuable, Callbacks
 
   class << self
     def receive(inbound_email)
@@ -22,7 +23,11 @@ class ActionMailroom::Mailbox
 
   def perform_processing
     inbound_email.processing!
-    process
+
+    run_callbacks :process do
+      process
+    end
+
     inbound_email.delivered!
   rescue => exception
     inbound_email.failed!
diff --git a/lib/action_mailroom/mailbox/callbacks.rb b/lib/action_mailroom/mailbox/callbacks.rb
new file mode 100644
index 0000000000..ae5a461d8f
--- /dev/null
+++ b/lib/action_mailroom/mailbox/callbacks.rb
@@ -0,0 +1,28 @@
+require "active_support/callbacks"
+
+module ActionMailroom
+  class Mailbox
+    module Callbacks
+      extend  ActiveSupport::Concern
+      include ActiveSupport::Callbacks
+
+      included do
+        define_callbacks :process
+      end
+
+      module ClassMethods
+        def before_processing(*methods, &block)
+          set_callback(:process, :before, *methods, &block)
+        end
+
+        def after_processing(*methods, &block)
+          set_callback(:process, :after, *methods, &block)
+        end
+
+        def around_processing(*methods, &block)
+          set_callback(:process, :around, *methods, &block)
+        end
+      end
+    end
+  end
+end