@Scott Millar I am currently using 2 additional domains. Each domain has 5 Microsoft email inboxes. For email warm-up, I send 30 emails per inbox per day, 5 days a week, also send 30 emails per inbox per day for email campaigns limit cap. The email setup is now strong. It took about one and a half months to complete the warm-up process, and the delivery rate is currently 100%. Now, my main focus is on improving offers and running email campaigns.