I'm trying to setup a CNAME, and coming from a technical background this process is ambiguous, so perhaps we can create a simple guide, and post it as a sticky. Ideally, it would have instructions for the top 5 hosting providers.. like the email whitelisting guides that show steps for outlook, hotmail, gmail, yahoo mail, etc.
I use 1and1 as my hosting company (not recommended for several reasons). While I'm waiting for it to update I will post my steps here:
1. Create a subdomain such as
forum.yourwebsite.com.. A CNAME is NOT the same as a forwarded subdomain. 1and1 has a warning that these are advanced DNS settings, and use caution in changing them.
2. Note: Setting a domain or subdomain as a CNAME will stop associated email from working
DNS Settings (quote from 1and1 "edit DNS" admin panel)
Full functionality cannot be guaranteed if you choose DNS settings other than the original 1&1 settings, such as e-mail and web space. Click on Reset to return to the 1&1 default settings.
3. Follow these instructions on editing the DNS of the subdomain:
4. Here is the ambiguity. There is still the option (while DNS is updating anyway) of using either a FRAME or HTTP redirect on the subdomain. This part I find confusing.