g1smd - 10:41 am on Feb 6, 2009 (gmt 0)

Verify that your redirect returns 301, and not 302. Use Live HTTP Headers for Firefox.

Check that the redirect works for both www and non-www at the old domain, and that both redirect you to www at the new domain.

Verify that the originally requested filepath is preserved in the redirect. That is, ensure that a "page" request at the old domain is NOT simply redirected to the root of the new domain.

Verify that non-www on the new domain redirects to www on the new domain, and preserves the originally requested path.

Check that for any starting point that is redirected, that the final target URL is reached in only one hop. That is, make sure that stuff like this does NOT happen:

exampleolddomain.com/somepage --> example.com/somepage --> www.example.com/somepage

Make sure that start to finish, the user sees just one redirect, and does NOT see a chain.