A friend of mine has his email hosted elsewhere (Hosted Exchange) but his DNS and Website are hosted on the same server. Lately there was an outage of his webserver, and you as you by now already would have guessed, his mail was unavailable due to this outage as well. The only way to solve this is to host his DNS elsewhere. If possible he wants to have some kind of DNS failover or redundant DNS, or as he would say: don't put all eggs in one basket.
Since there are so many free DNS providers our there, I assumed this would be common practice and quite easy to do. However, I don't seem to be finding much tutorials or how to's on doing so. The only one I found was this one
http://hostingfu.com/article/redundant-and-free-domain-name-service-editdns-everydns
Sadly It's a bit outdated but the principle remains the same (I guess).
First, what DNS providers would you guys recommend for the situation I am trying to achieve? I was thinking of ClouDNS.net and Namecheap perhaps? Cloudflare's Twitter doesn't make me too happy, seeing al those outages lately..
Second, do you guys have any other tutorials/how to on how to setup a failover/redundant DNS?
Thanks!