Thanx DAN! But the question: How could they be separate previously?
To justify this I can tell that user@domain.ee had e-mail forwarding and that was working only for him! E-mails coming to other account (user@domain2.ee) were not forwarded. No every e-mail to any of this accounts is forwarded.
I see that in my previous setam maybe something were wrong-but I really liked it and want it back.
I was using e-smith 4.0b4 with some updates (as best of 4.0 series) and then upgraded to 5.0, and configuration was preserved).