Views:

To resolve this issue:

  1. Go to the IMSVA web UI and navigate to Policy > Internal Addresses.
  2. Check if the wildcard "*" or the target domain has been added to the internal address list.
  3. If "*" or the target domain are on the list, remove them.
  4. Click Save.
  5. Verify if IMSVA can now sign the outgoing mails.
 
This solution will impact the statistics on incoming and outgoing mails. However, the change actually should be expected because the previous statistics are incorrect.