Follow these instructions to set up a CNAME in Yahoo! Small Business
- Log in to your account at smallbusiness.yahoo.com.
- Click Domain Control Panel below the domain you'd like to use.
- Click Manage Advanced DNS Settings.
- Click Add Record.
- In the Source field, enter only the sub domain you want to use. For example, if you designated m.mydomain.com as the address of your mobile site, enter m in the Source field.
- Enter m.brickandmobile.com or m.cloud-host.mobi in the Destination field.