def call(mail)
      begin
        Bugsnag.configuration.set_request_data :mailman_msg, mail.to_s
        yield
      rescue Exception => ex
        Bugsnag.notify(ex, true) do |report|
          report.severity = "error"
          report.severity_reason = {
            :type => Bugsnag::Report::UNHANDLED_EXCEPTION_MIDDLEWARE,
            :attributes => FRAMEWORK_ATTRIBUTES
          }
        end
        raise
      ensure
        Bugsnag.configuration.clear_request_data
      end
    end
def call(mail)
      begin
        Bugsnag.configuration.set_request_data :mailman_msg, mail.to_s
        yield
      rescue Exception => ex
        Bugsnag.notify(ex, true) do |report|
          report.severity = "error"
          report.severity_reason = {
            :type => Bugsnag::Report::UNHANDLED_EXCEPTION_MIDDLEWARE,
            :attributes => FRAMEWORK_ATTRIBUTES
          }
        end
        raise
      ensure
        Bugsnag.configuration.clear_request_data
      end
    end
Calls the mailman middleware.