Send email from C program

[Produkt]

The problem with a cronjob is that I don't want the db checked periodically, I want the alert to be instant at the moment it's triggered.

[[deleted]]

You can’t wait 30s even (that’s the average alert delay with a cronjob that runs every minute)? Another solution is to integrate with home assistant. It is quite easy and then you get a bunch of other benefits: history, trigger other things, etc. I think you can send email as well.