How to read a single outlook mail at a time for a specific keyword?

How to filter or read single mail id from outlook. If I am using FOR EACH. I don’t want to iterate that much time , how much mails are available. Based on my condition, I want to read only single mail and want to stop . If more than one mails are available then how to read only particular mail at first only. Kindly suggest

Hi, perhaps the below link will give you some idea how to filter emails: