Hi @JWilkinson5,
This depends on the exact notice you’re seeing. You can find more information here: Resolve email sending suspensions
If it says that the suspension is permanent, then unfortunately that exactly is the case. You can try upgrading for a month to any starter subscription to gain access to HubSpot support via email but there is no guarantee that the email tool will be unblocked.
If the notice outlines specific steps that you need to take for an appeal, you would follow those steps.
Best regards