Hi, Thanks for the bug report.
I see that on my Squeeze system , /var/spool/mqueue-client is owned by: user: smmsp group: smmsp Can you try adding the following lines to /etc/munin/plugin-conf.d/munin-node: [sendmail_mailqueue] user smmsp Restart munin-node (invoke-rc.d munin-node restart) to apply the configuration. If this works as expected, I'll add it to the next build. Regards, Tom Feiner
