You wish to host a mailserver on an EC2 instance. What two steps must you take to ensure utmost reliability?
A) Create an EIP for the instance.
B) Configure the mail service to serve as an open relay.
C) Contact AWS to have a Reverse DNS record configured and to help keep your domain from SPAM blacklists.
D) Provide open security group access to your instance on ports 25, 3389 and 22.

Question

Quizplus · Accepted Answer

Assigning an Elastic IP (EIP) ensures a consistent IP address for your mail server, and configuring a Reverse DNS record helps with email deliverability and prevents being blacklisted as spam.

You Wish to Host a Mailserver on an EC2 Instance