Help me to solve the send email problem

fayssal May 19, 2023, 3:10 p.m. #1

I sent message from hotmail to my email. i recieved the email but the message return to sender in hotmail like in the photo.
I check my email in the website: https://www.mail-tester.com . it works perfectly 10/10 score.
i don’t know where is the problem. anyone have a solution can he or she help me please