15-20 sites will cost you $7.50-$10/mo as a base ($0.50 per zone * 15 or 20). Just assuming that every single visit results in a DNS lookup (which it shouldn't), toss in another million for MX/SPF/etc

I have only one dns server on a dedicated server.

The same file in the 2 DNS servers?

Double check your domain dns and mx records settings. It's not related to your webserver, you don't even need nginx to make Google Apps Emails work.

This may also help you: https://cloudharmony.com/reports Their free DNS report has lots of information.

rightdns=8.8.8.8,2001:4860:4860::8888conn ikev2-pubkey keyexchange=ikev2 auto=addconn ikev1-fakexauth keyexchange=ikev1 rightauth2=xauth-noauth auto=addconn ikev2-eap-tls also=&a

* Health Checks/DNS failover

Actually i lie had one issue with dns problem but sent a ticket through and 3minutes later got a response. Great service, fast network and highly recommend them.

* DNSMadeEasy - 2 years, no issues

Namecheap's DNS services never disappointed me.

rackspace dns is also pretty good, and free

CloudFlare DNS itself is perfectly fine, using it with their CDN can have issues since they're a DDoS magnet. London POP seems to be go down frequently for few mins.

honestly cloudflare's dns is great. no reason to pay for anything else.

I am currently using Cloudflare but I am curious of having a premium DNS service. I came across these services:

-Free Instant Reverse DNS

@lbft true, it is unfortunate that the illusion of 'sex' can be glimpsed as a morphemic connector between 'deus' and 'ex' after being consolidated into a single string to meet DNS requirements. I had

* Free reverse DNS management

(Quote)

system that I use. I even used the other DNS providers suggested by that script.

http://lowendtalk.com/discussion/44292/solved-server-with-vestacp-and-firewall-enabled-blocks-dns-lookups