# Register interceptors defined in app/mailers/user_mailer.rb # Do this here, so they aren't registered multiple times due to reloading in development mode. UserMailer.register_interceptor(DefaultHeadersInterceptor) UserMailer.register_interceptor(RemoveSelfNotificationsInterceptor) # following needs to be the last interceptor UserMailer.register_interceptor(DoNotSendMailsWithoutReceiverInterceptor)