Question Notifications are not sent in scheduled tasks

[gundall]

Server operating system version

Debian 10.13

Plesk version and microupdate number

Plesk Obsidian 18.0.59 Update #2

Hello everyone!

I'm trying to configure a scheduled task that checks my site URL and sends me a notification email if it is down. The problem is that I don't receive any emails, even with the Tools & Settings > Scheduled Tasks > Schedule a Task > Notify option set to Every time.

I've checked the /var/log/mail.error file, and this is what it shows:



Any clues on what could be happening? I'm new on Plesk, and I'm not familiar with mail server configuration; sorry in advance if this is a silly question.

 

[Kaspar]

The "Unknown user" mentioned in the log, it that the email address of the recipient (ie the email address you want to notifications to be send to)? It that's the cause does the domain and email address exist on the same server?