mailq: "permission denied" on Debian GNU/Linux 11 (bullseye)

[markuslf]

This issue respects the following points:

• [X] This is a bug, not a question or a setup/configuration issue.
• [X] This issue is not already reported on Github (I've searched it).
• [X] I use the latest release of the Monitoring Plugins (https://github.com/Linuxfabrik/monitoring-plugins/releases).
• [X] I agree to follow Monitoring Plugins's Code of Conduct.

Bug description

exim: permission denied. Mail queue is empty.

Steps to reproduce - Plugin call

'/usr/lib64/nagios/plugins/mailq' '--critical' '250' '--warning' '2'

Steps to reproduce - Plugin Version

Latest

Steps to reproduce - Data

No response

Python version

No response

Environment

Debian GNU/Linux 11 (bullseye)

Application

No response

Python modules

No response

Additional info

No response

[markuslf]

Unable to reproduce.