Trigger xxxyyyzzz: Unable to access target record for table name sn_customers

[Mira1992]

Hi,
I have a CSM question.
When trying to update a Case via inbound email our Flow does not get triggered if the email is NOT from User.
In the email log there is a message:
Trigger db40161f1b27e5504c98ec69b04bcb7e: Unable to access target record for table name sn_customerservice_case, skipping

Flow itself is fine and works for users but as far as I know when an email is sent from an external user, Guest user is being used to create/update a Case.
Case creating works fine via inbound emails but not updating.

I believe the issue is with some role Guest User should have or with the ACLs but this is where I am lost.
What would you reccomend me to make this work? Assign some role to the Guest user or create ACL?

Many thanks for any help.
Miroslav

[Allex Sousa]

Only if your goal is for the flow to trigger only when the email comes from a few specific users. But generally, the recipient field is more appropriate, for example, recipient contains example@example.com.