Consider a cron that sends digest emails for invalid abandoned forms and mail failed submissions

[chrisblakley]

When a form submission is invalid and abandoned or when the mail fails for a successful submission, content managers and administrators do not get an indicator in their email. The only way to know these have occurred is to check the submissions list in WP admin.

Since Nebula now knows when these have occurred, it could send another email notification maybe as a daily digest if/when they happen. A mail failed submission could even be attempted to send right away instead of waiting for a digest time.

Another option could be to have an alert notification in the WP admin so that it can be shown without needing to click into the submission listing. This could be a good way to start this feature before introducing an email notification.