Hi After receiving hunders of error messages whenever sudo was executed I was able to pinpoint it to the situation whenever libsss-sudo was installed.
I'm uncertain whether this still is the reight place, but the plagueing me as by Dimitry. Situation is: Debian jessie, sudo installed. A local sudo user can sudo without issues, no message is sent. Then once libsss-sudo is installed - I tried without sssd installed or configured, just libsss-sudo: Mails start flooding in with every sudo executed. I've now been able to reproduce this on a couple of systems until I reduced it to a system where sssd was not installed and it already started The Fedora patch as mentioned by Timo is applied to sudo in jessie. However jessie ships with 1.11.7, not 1.12.5 where he mentions that it was not found. Is there is anything possible to get this fixed, basically it messes up setups for those who use sssd with sudo sending messages for each and every sudo run by a user. Best regards, Mathieu