I signed up for a trial with a large hosted shopping cart SAAS. Using my own domain was very straightforward for this newbie because all I had to do was point the domain to their name servers. However, it turns out that they don't allow new customers to redirect non-www to www, so to avoid seo suicide I transfer the name servers back to me.
I've heard that there is a way to redirect the non-www to www using just DNS (on my own server I use htaccess), but I'm having trouble wrapping my thick skull around how to correctly implement it for my specific situation. Here is what I just put down in the dns, hopefully someone can tell me what I'm missing:
hostname | ip address/URL | Record Type
@ | 188.8.131.52 | A
www | mystore12345.hostedcartdomain.com. | CNAME