Hi @pwlund,
Are you referring to the deny list for conversations inboxes? Manage the allow and deny list in the conversations inbox or help desk
If so, then this is expected behavior, see the article above: “In addition to the email addresses and domains that you manually add to your allow or deny list, the following will happen by default in your inbox: Emails sent from noreply@hubspot.com will be marked as spam.”
Hope that clarifies the behavior!