When I first started with VPSs I would buy a domain name and set up DNS so I could access it through a name. Now I've moved on and just use IPs. With a domain name that resolves to the VPS setting rDNS easy, the domain name.
But with just an IP I am stuck on how to set the rDNS. My main concern is sending email through the VPS and getting it through the spam filters than penalize for lack of an rDNS entry. I do have a Mandrill account, but I have a couple of sites that send 200 emails a day (not spam) that I want to be able to send through Postfix on the VPS and not relay through Mandril.
What is the best practice for this situation?
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