Installed DOCKER and pulled the docker-mailserver on AWS instance. Got everything installed and the mail server running. I opened the ports using AWS security groups. I configured DNS (correctly, I think). Mail client seems to be connecting ok. Sending e-mails to the account results in them disappearing forever. No bounce back and not received in my mail client. I sent an email from the mail client and it never arrived at destination either.

I'm looking at var/mail and I see no subdirectories for mail that would be stored. I'm thinking I'm having a permissions problem but how can I tell?