My customer has to send an email to their client every day with a status report, and has a strict SLA to send the email within a particular time window every day (i.e. between 15:00 & 16:00).
Can you think of a way to alert IF the email is not sent? I think it might be possible to use the IMAP sensor, but can't think how we might trigger an alert if something hasn't happened?
Any advice would be appreciated.