Hello
I am creating a mail server which will send on behalf of other domains. So how could I do it. I have setup one mail in box server as root mail server and it works fine. Now I want to send on behalf of the other domain.
You can see here http://prntscr.com/dqy68v
Message : “You may not make a user account for that address because it is frequently used for domain control validation. Use an alias instead if necessary.”
So is there any possibility using mail in a box ?
Thank You