SAP PI 7.31 single stack: how to send mail if channel has not been processing message before given time

Hi

I would like to know the simplest way of setting up a mechanism on our SAP PI 7.31 single stack where a mail is to be sent to certain recipients if a receiver channel has not processed a message before a given time each day.

For example if file receiver channel "Allocation_File_Receiver" has not processed any messages by 6 am a mail to "hello@world.eu" should be sent with the mail body "No Allocation messages have been processed today!"

Hope there is an easy way of doing this.

Br

Mikael