One way that I've noticed that I receive SPAM is when someone spoofs my address to send to me. I'm not saying that they are defeating any of my existing measures, but I still want to be able to block this from occurring.
So, is there a way for the SMTP Relay to be configured to reject any mail from my domain inbound. Essentially, my firewall is the primary MX for my domain and my internal SMTP server is the destination of all mail TO my domain, which means that no mail FROM my domain should originate outside my firewall EVER. So, to be strict in regarding this, I want the firewall to reject incoming mail FROM my domain as this would clearly be a spoof.
Can it be done? TIA!
Rob Fegley
This thread was automatically locked due to age.