I've got two of these spare and I was thinking of doing my own PDNS cluster with MySQL master and slave for DNS.

1) [Feature] IPv6 Support added for Virtualizor Reverse DNS.

That's only if the sender chooses not to set up a tracking/return-path DNS record. The difference between Mandrill and Mailgun is that Mandrill leaves that optional while Mailgun requires it.

I was going to set this up with ChicagoVPS, but they said it wasn't possible and recommended lame DNS failover.

(Quote)

I know that, just small joke. I have one of this and i have much better perfomaces on other servers and VPS i use. But i will add, for small site, dns, some load balancing, this is all what you need.

Has the DNS propagated?

Can I delegate reverse DNS?

Centos 4.x, 5.x, 6.x, 7.xDebian 4.x, 5.x, 6.x, 7.xFedora Core versions 10 through 20Ubuntu 12.x, 13.x, 14.xGentoo 2012, 2013Slackware 13.x, 14.xWindows Server 2008 R2 (Web and Standard Edition)Windows

* Reverse DNS Available (On Request)

DNS services would be ace but can use domain providers.

1 minute ping/ssh/smtp/websocket/DNS/SIP

I have been using Cloudflare for all my domains, 2 paid and bunch of free ones. So far I have had no problems. I use them mostly for DNS and not cdn, so dont know much about how the cdn performs.

* Change Name Servers pointing to Cloud Flare DNS

It's actually + anycast + DNS, backup space, offloaded MySQL, and probably other things I'm not remembering.

do I need to open a ticket to set reverse DNS?

-Free Instant Reverse DNS

POP3 is available on default ports 110/995. DNS will just be changing your MX record(s).

One more question. (may be stupid). If my website is in another server. How the DNS will work. Will just adding a MX record enough for using the mail service?

Of course, setting up a new root DNS system will be more complicated and the existing one will not take lightly a really free TLD and, also startcom has limitations.