Thanks for helping. The question was related to virtual user's who have maildir homes of course.
I was able to solve the problem a few moments ago, .forward works as needed (only if it exists). And also the maildrop problem is solved, since .forward can use SIEVE filtering when written "#Sieve filter" in the first line.
> Hi Guys! > > One more thing. > > .forward files seem to not work with the standard configuration of Exim4u. > Anybody know how to make it work? > > > For local users or virtual users? Explain what you want to do, for which