How can I find text in the message of an email (Apple Mail or Outlook)?

Post date: 2018-01-10 22:15:25
Views: 78
I would like to be able to look for a bit of text (e.g., "XXYY") in the subject OR the message of an incoming email, and flag it to myself somehow. I have found ways to apply rules in Apple Mail to the text of the incoming subject, but not the body of the email. I could also implement it in Outlook if it's a possibility there.
Other Top and Latest Questions:
TransferWise applying for Brussels license in bid to navigate a ‘no deal’ Brexit
Want to Stay Healthy? 5 Reasons to LOVE Squats
Daily Cute: Fox Playing with a Dog Toy
How to Get Involved with Citizen Science
Driving from Munich, Germany to Cortina D'Ampezzo, Italy in late March?
Should I buzz my head?
Donating a memory foam mattress in Oakland California
Costume wedding help, difficulty level medium
Best Action Scenes in TV and Film
This is a scam, right? This is not how civil suits work, is it?