Gmail 404
From DreamHost
If you are getting a Google 404 error page when trying to access Gmail for your domain, you will need to first log into your Gmail Dashboard, then change the URL for Gmail and then switch it back to mail.DOMAINNAMEHERE.com. You'll first log into your Gmail Admin Dashboard here:
http://www.google.com/a/cpanel/DOMAINNAMEHERE.com/Dashboard
Once logged in, under "Service settings", you'll click Email
You will then change the URL for your domain to a different URL.
On the next page, switch the URL for Gmail for your domain.
After changing the URL, you will then switch it back to mail.DOMAINNAMEHERE.com.
You can then Flush_DNS and your Clear_cache and try the URL in your browser again.
