I am trying to set up a mail server on EC2 instance. I have requested an elastic IP and have asked AWS to lift email /rDNS restrictions which they replied they have done so (after I sent them my detailed use scenario).
My elastic IP is 1.2.3.4.
The next step would be to update the rDNS on my elastic IP. However, when I write (and confirm) the rDNS on the dialog, the "update" button remains disabled. (Actions -->Update reverse DNS on the Elastic IP config)
I have a domain mydomain.com who is managed on another DNS provider (Cloudfare). I have made a 2 NS records pointing to 2 different AWS NS servers for** mail.mydomain.com** (nsxx.awdns-xx.org)
I have made a zone on Route53 for mail.mydomain.com, where** aws.mail.mydomain.com** has an A record to 1.2.3.4.
I have made a zone on Route53 for 4.3.2.-in-addr.arpa with a PTR record named 4.3.2.1-in.addr.arpa associated with aws.mail.mydomain.com.
Forward DNS seems to be working fine. **aws.mail.mydomain.com **resolves to my elastic IP and I can communicate with my EC2 instance
Reverse DNS still resolves to ec2-1.2.3.4.compute-x.amazonaws.com
What am I doing wrong?
