I'm looking for a way to get alerted when I don't receive a certain email in time.
The situation is as follows:
I have a Synology NAS that takes hourly backups of my files. Upon completing the backup job the NAS sends an email to an address that I configured. The backup jobs usually take a few minutes so that the email is sent a few minutes after a full hour.
I'd like to set something up (email inbox rules, ifttt, insert more cloud services...) to notify me if the that report email isn't received in a timely manner or contains an error message.
I've already had a look at ifttt but that doesn't seem to cover this sort of approach. I can pick the email provider of the target email address freely so.
Any ideas what to do here? Thanks in advance!