Hi @Norman,
Automatic email suspensions that occur as a result of violating the thresholds for healthy numbers of unsubscribes, complaints, or bounces are permanent. To ensure industry-leading deliverability we have automated protection in place that can’t be reversed. You can continue to use HubSpot’s other tools available in your account, including 1:1 emails via the CRM or your connected inbox. Check out the guide below for more on this!
I’m afraid it is not possible to reinstate markerting email sending to the account at this time.