Hello, I'm trying to find out if it's necessary to create a rule to permit traffic on TCP Port 25 from a server on our domain to our main Exchange mail server for the the purpose of sending out email outside of our domain (in this case to customers and suppliers from our billing systems).
I'm well aware of the risks of creating open relay's on mail platforms and have taken steps to secure the Exchange server, but I still can get the message to route from the billing system to the Exchaneg Server, has anyone got any experiance if this is necessary with Webroot and if so what the rule would look like.
Any contributions would be welcome 😃
Rule to permit traffic to route to Exchange2010 server
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