We recently switched to a new domain and mail server, and since then we havent been able to deliver emails to hotmail.com @outlook.com addresses until a user sends us a message and we reply to them. Or they add us to their safe list.
Despite the fact that our IP is clean, we have valid SPF, DKIM and PTR set.
There is no bounced email so we have no idea of knowing which one of our email to the hotmail client is received, hotmail just silently drops the email.
Can one of the reps PM me so i can share my domain and other information.