Not receiving any SMART mail from postfix on Armbian 21.02.3 Focal

[Schroedingers Cat]

I have a Ubuntu Server 18.04 with postfix installed and configure it the same way as I did on my Helios64 running Armbian 21.02.3 Focal. Last week, one of my older drives died in the Helios, but I didn't get an email about this. My Ubuntu Server 18.04 will send me mails as soon as there's an issue in the SMART values from the drive. I didn't had to configure anything to do that apart from postfix. I can send a test mail from both my Ubuntu Server 18.04 and my Helios64 Armbian and receive both.

 

Any idea what the reason is that my Ubuntu Server 18.04 is sending me those emails by default and how I could enable this on my Helios64?

[Werner]

Moved to p2p since this seems a userspace issue and not particular related to a specific hardware.