When using SMTP servers to send notices in Koha, if the sending fails there is an error message shown "Unhandled email failure, check the logs for further details". If the Koha is not hosted by the library, checking the server logs may not be possible. It would be beneficial to have at least the actual error code displayed to assist library staff with troubleshooting. This could be shown in the notices tab, centralized to the action logs, or a third option I haven't thought of yet.