Need a solution

[soringo]

Hi guys.

I need a solution...I have a client with dns and web sites on my server and email server in his building.....the problem is that when another client try to send mail to one of this client user they get error message that the user is not knows in mail box table...is ok because postfix look for the mail box in his local db....I've tried to delete vmd entry from conf of postfix but no result...postfix still try deliver the mail localy.
I there a solution ?