I have dozens of domains redirected to my various adult sites. All of them have a “RedirectPermanent” directive entered.
If you are on Apache & depending on your setup, you can enter a “RedirectPermanent” to your httpd.conf file. Your host should be able to help with this.
I am certainly no expert, but that is what I do.
Also, after you have that entered, go here and check it:
Redirectcheck.com.
There are different ways of setting up redirects and you want to make sure it has been done correctly.
For example, if you enter my site http :// mradultaffiliate.com you will see it returns “301 Moved Permanently” and redirects to the new domain.