How to Detect A Mail Automatically sent from a MAC MAil Box?

Hi everybody.

I have a mail in database in which web mails arrive. But sometimes Mac mail sers send mail generated by mac mail rules to simulate an out of office mail !

I would like to detect this type of mail. Do you have any idea. I’ve been looking for a solution since 1 week !

think you for any ideas…

Loizani (from FRANCE)