Server rejects recipients address
Trying to respond to an email I received so I know the address is correct. I am using my iPhone XR ios 15.3.1. Getting msg “the server has rejected one of the recipients addresses.” This only happens with certain addresses. I can respond using my laptop so I think it’s a problem with my account setup on the iPhone. I had a very hard time setting up and getting the email to work at all on this phone. I am not tech savvy at all. Any help is appreciated.