As far as I see you can configure dkim if this is the Sophos email appliance
https://docs.sophos.com/central/customer/help/en-us/ManageYourProducts/GlobalSettings/EmailDomains/DkimKeys/
--srs
From: Salvatore Jr Walter P
Sent: Sunday, March 5, 2023 6:51:59 AM
To:
Unfortunetly that is not possible with the sophos box as it's the gateway, so
it's the first place incoming hits and the last place outgoing hits and there
is no way to change that. We are looking at replacing it as it is really not a
good system so this may be something I can use to push for an
