Hi, folks, Is anyone else experiencing issues with Sender Whitelist entries "disappearing," when you switch between tabs in the User Portal? I'm currently running firmware 9.351-3, but I've had this problem with all previous versions, as far as I…

Hi, In my opinion, the recipient verification is to reject not known addresses with the utm and not relay to backend SMTP Server. I tried callout or AD verfication to an Exchange 2013 and get in both ways a NDR-Message from the Exchange and not Sophos…