Hi @spetrick. You are correct: we do not have separate bounce types for temporary and permanently suspended bounces and I can see how this would be useful to determine which contacts you may think about removing.
It's possible the code we received back was translated as non-existent in our system but I'm not able to confirm that without seeing the email address. I did want to point out a new feature in our reporting that allows you to do a one-time unsuspend on a suspended contact so you can try to send to this address again. However, if they do bounce again, you may need to speak with our Deliverability team so they can see what causes the address to bounce.
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