Z 4 z 5 hwěžkow pohódnoćeny

wot Martijn dnja Měrc 10, 2009 · trajny wotkaz

Works well. I used it to separate 3000 duplicates from 200 actual messages. Thunderbird had created these due to some bug.

Although the UI isn't very intuitive, it does what it claims to do, and pretty fast as well.