We experienced a severe network problem across many ISP's this week that resulted in a bunch of email non deliveries. I now have many email addresses marked as on hold, I think because of the unusual network problems. I want to unhold these addresses, but do not want to unhold emails where addressees opted out.
Is there a way to search for emails that are on hold because of bounces, and not because they opted out. (alternatively can I search for emails that are on hold because of an opt out, and not because of bounce processing).