Summary:
I think this would help make the transition to the new "global" exclude list (CHD-1473) a little easier for non-admins who aren't privy to blocked addresses. On a ticket with no recipients, the "Add to Recipients" button will silently fail with no explanation for why. If we could perhaps extend the red warning with some more information it might help. "Warning: This ticket has no recipients. no-reply@example.com, do-not-contact@example.com are addresses on the global exclude list in 'Mail Setup'."
Steps:
1) In 'helpdesk setup', 'Mail Setup' add a couple of test addresses to the "Always exclude these addresses as recipients".
2) Create a ticket from one of those addresses to force the "Warning: This ticket has no recipients" red flag.
3) Click the "Add to Recipients" button that replaces the "Reply" button.
Result:
Button silently fails and disappears (will reappear on a refresh), the 'Recipients' list is not updated. And there's no visible indication as to why this happened.
Improvement
Open
[Exclude List] Notify users as to why a recipient you are trying to add is blocked
