We have our e-mail with Office 365, and are trying to use a Barracuda spam filter appliance in front of it. We have set up the inbound connector in FOPE. I have worked with Microsoft and Barracuda support trying to set this up. When we send a test message from the appliance to our MX record ( which is currently still pointed to 365) it says that FOPE refused the connection. I can put credentials in the Outbound Connections on the Barracuda spam filter, and e-mails will get through, but only if they come from the e-mail address associated with those credentials. Obviously this is not what we need. Has anyone successfully set up a Barracuda spam filter in front of Office 365?
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