Is it possible to set up a reverse DNS record on AWS for address from a different registrar?

I don't have control over the registrar for the domain we use but the elastic ip and domain have been registered to each other - now I need to set up a mail server on my EC2 instance and therefore be able to set up a reverse DNS record as well. Will I still be able to do this even though aws is not my registering authority?

Solution 1:

From a technical perspective it doesn't matter where the forward DNS is hosted.

The reverse DNS is typically hosted by the provider of your IP-address, so in your case by Amazon. As long as the forward DNS matches your actual ip-address and the PTR-record you're requesting, Amazon allows you to set-up a reverse DNS record by contacting them.

Q: Can I configure the reverse DNS record for my Elastic IP address?

Yes, you can configure the reverse DNS record of your Elastic IP address by filling out this form. Note that a corresponding forward DNS record pointing to that Elastic IP address must exist before we can create the reverse DNS record.

Solution 2:

Yes, it doesn't matter.

Simply setup your reverse DNS zone on your hosting or on the domain itself using a zone and then a PTR record and then contact them here:

https://aws.amazon.com/forms/ec2-email-limit-rdns-request

You'll fill in the IP and the host and they will then approve. Ensure it is setup correctly, else they will not approve the reverse DNS.