Agreed. Very frustrating. For me it started with the last update to the mobile app (v7.1.1). A few come through with the correct sender email address. Most say No Recipient. IPhone 10 - ios 12.1.2
This is about the same time it happened to me. I cannot locate any place to contact Xfinity to determine if they are going to update the Xfinity email on iPhone.
If anyone has a contact, please share!
Same problem...just started this week...Ipad and Iphone. someone say something when they hear WHY! AND...doesnt happen on my Gmail!