Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

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Sophos XG acting as Open Relay

Dennis Braun

Hey Community,

I´ve got a probleme which I don´t know how to fix, maybe some of u can help me!

I´ve created a MTA on my Sophos XG 18 which receive and send Mails for my Exchange 2016.

Now I have checked my mail flow and to my suprise mxtoolbox said it could be an open relay and yes, it is.

Here is my configuration, maybe I´ve overlooked something.

Where is my probleme?!

Many thanks



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