email gateway for ec2 instance

[oah433]

Hi
I have the following setup and I am not sure if proxmox email gateway is intended for such deployments:
I did the following
1- Changed the MX-record to point to the public IP (100.10.10.10) of my on-premise PMG machine
2- Did 1:1 NAT for the public (100.10.10.10) and private IPs (5.5.5.4) of the PMG machine
3- In the default-relay I had the public IP of the email-server 7.7.7.8 (running on AWS Ec2-machine)
4- In the relay-domains I added my domains mail.xyz.com and xyz.com
5- Configured the firewall on my AWS machine to ignore all the traffic that comes to port 25 except from the public 100.10.10.10 (public IP of my PMG)
This setup is not working and I can't see why. What am I missing here?

Note: I have WHM running on my EC2 server. Do I need to apply any settings on its side?

 

[hata_ph]

1. Double check your mx record is properly set https://mxtoolbox.com/SuperTool.aspx?action=mx.
2. Double check your PMG's external and internal SMTP port is properly setup.
3. May have to add your ec2 ip in PMG trusted network/whitelist.

 

[oah433]

let me test it out and see how it goes.