I'm trying to request to unblock port 25 on my ec2 instance. I know very well that whatever they put as (optional) is 100% not optional. I've been asked over and over again to repeat these steps.
(Optional) Provide the AWS-owned Elastic IP addresses that you use to send outbound emails as well as any
reverse DNS records that AWS needs to associate with the Elastic IP addresses. With this information, AWS
can reduce the occurrences of emails sent from the Elastic IP addresses being marked as spam.
How do I complete these below actions?
The request also asks me to do this:
If you're using Amazon Route 53 as your DNS service, either create a new resource record set that
includes an A record, or update your existing resource record set to include a new A record.
It doesn't specify what the A record value should be.
Here is what you need to provide:
What is the elastic ip address that I used to send outbound emails and how do I get it?
This is the public IP address of your instance(s) that will be sending the emails on port 25. Make sure you have allocated an elastic IP address to the server(s).
What is the reverse dns record for that elastic ip address and how do I get it?
Traditionally this is where someone might create a PTR record containing the EIP and port number (25) and map this to a domain (e.g. smtp.example.com). You will need to provide AWS with the domain name that emails will send from so if you were sending from hello@example.com they would whitelist example.com.
Adding A Record
And for the extra of set an A record they are asking you to bind your domain e.g. example.com to the elastic IP address of the server in your DNS configuration. This is to prove you control the domain that you're wanting to send emails from.