I am doing some automation on outlook mail box, previously it was lotus notes.So i am looking for equivalent properties in outlook. The lotus notes mail items has a item named FAILUREREASONwhich has the details about why the email is failed such as delivery failure reason etc. This item will be available when the mail is a delivery failure email. So when i loop through mails in inbox i can recognize which mail is a delivery failure email in inbox and which is actual required mail to be processed. But in outlook MailItem object i didn't find any option to get it. I searched for any solutuion but not able to find any. We can search subject for words such as 'failure' but it's not good approach. Can anyone know the property that i need to look or any other approach for the same.