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We are running 17.1, but are trying to upgrade to 18.1.
However on the new firewall, when we install it and restore the config from 17.7, our internal Exchange server cannot connect outbound to other SMTP connections.
What has changed that might cause this?
I have tried telnet to an external mail server on port 25, and that fails to connect as well.
incoming mail, web and SIP connections etc, all seem fine.
However on the new firewall, when we install it and restore the config from 17.7, our internal Exchange server cannot connect outbound to other SMTP connections.
What has changed that might cause this?
I have tried telnet to an external mail server on port 25, and that fails to connect as well.
incoming mail, web and SIP connections etc, all seem fine.
