I need to enable quota for trash folders. Here i found that i need use
to compile maildrop and courier-imap.

I did some research and found This.

Downloaded sources and executed:
DEB_BUILD_OPTIONS="--with-trashquota" fakeroot debian/rules binary
for both packages. After all finished i have installed produced packages and restarted system.

I cant see change, trash folder still has unlimited space - what i did wrong?