Allow a user's email address to be marked invalid, and suppress most

notification mails for such users.

db/migrate/013_add_email_valid.rb

@@ -0,0 +1,10 @@
+class AddEmailValid < ActiveRecord::Migration
+  def self.up
+    add_column "users", "email_valid", :boolean, :default => false, :null => false
+    User.update_all("email_valid = active")
+  end
+
+  def self.down
+    remove_column "users", "email_valid"
+  end
+end