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I fell into this problem a while back with the domain I use for my mail. Everything was set up nicely in Namecheap's DNS so that the MX records were pointing at GMail and the root CNAME was pointing at my webhost. After a couple days not getting mail, I figured out what the problem was.

Oddly enough, unlike the article, Comcast's DNS was working fine with my domain fine on the root CNAME.

Most services like Heroku or Google's AppEngine (where you set up a CNAME for your domain rather than an A record) recommend that you have your DNS provider to a redirect to the "www." version. Namecheap's DNS will do this (a lot of providers offer redirects in their DNS system which isn't really DNS, but is a simple value-add for them to provide).




http://support.google.com/a/bin/answer.py?hl=en&answer=2...

You don't have to use a DNS provider to do redirection with AppEngine.




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