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Sophos Secure Mail Error SUP203

Hello everyone,

i'm currenty testing the Container solution for our Company.

I added the Container Policy to the Secure Mail App, now im getting the error "A server error has occurred. The server certificate is classified as untrusted. (SUP302)."

I didn't find anything related to that error (SUP302). Does anyone nows a solution to that?


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  • Hi,

    sorry, needed to add more information.

    It happens on every iPhone we have, It happens when i try to update the Mail tab. And it happens in every Wifi i'm connected to (or mobile data).

    When i launch the app the error does not appear. We do not use Androids.