I've set up a website for someone and redirected his domain to point to my server. He has his own exchange mail server he still wants to use. He couldnt recieve mails after the domain transfer.
I've added a MX record with the servername of his exchange server, and now he can send and recieve. Its under 24 hours since his mail stopped recieving.
Now my question: Is there a way to get the mails he should have recieved before I added the MX record?