I have a Ricoh c401 printer, scanner in an office of a customer. When the users where trying to scan to email the firewall where stopping the communication. I created a user filrewall rule saying that for LAN 192.168.1.45 the ip of the Ricoh, Destination LAN, WAN permit ANY, and the users started receiving their scans to email, I want to make the firewall rule more specific, What protocol do I need to permit SMTP for the scans to be received to emails?
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