I have a fresh install of Virtualmin using the install script. I am running Ubuntu 20.04. Everything seems to be working except for Postfix/SMTP. I can receive mail, just can’t send it. I have confirmed the service is running, tried both secure and non-secure ports, even tried a custom port. I can’t even send a message via Usermin. I receive an error stating “ Failed to send mail: SMTP command failed”
I’ve searched the web high and low on how to fix this, but now i’m at a loss. Any help is appreciated!