Guys,
I'm looking at implementing T.37 fax (onramp / outbound) where users email their document to the Unity fax service mailbox and this send it out the IOS gateway to PSTN.
I've been asked how it is possible to stop users from accessing this in order to get free fax service, when only specific users are to have this facility.
I can block all SMTP to the router with an ACL, and permit only the Unity / Exchange servers, but how do I stop users from mailing to the Unity IP Fax service?
Thanks in advance,
Chris