Z 1 z 5 hwěžkow pohódnoćeny

It is logging every mail you open directly to /var/log/syslog !!!
Leaving a trace there. Using last thunderbird version.

Tute pohódnoćenje je za předchadnu wersiju přidatka (3.8.0). 

This plugin does not log anything to syslog, not even sure that would be possible. Send me a screen shot if you would.