To safeguard you from spammers, you will need to be sure that the company you decide on in your VPS server takes advantage of Port 25 and doesn't block it. With the availability of gp3-backed AL2023 AMIs, This can be The 1st time a gp3-backed Amazon Linux AMI is offered. https://it-support-services45555.theisblog.com/26349919/considerations-to-know-about-linux-server-premium-support