Messages from some or all sources are delayed or fail to be delivered. When searching the Message Audit Logs for the sending IP via the Control Center Status > Message Audit Logs you find:
- Message audit logs shows "Sender aborted connection" as the action for these messages.
- Audit entries for messages with the "abort message" verdict show the mail sender.
- Audit entries for messages with the "abort message" verdict shows the subject as "(none)"