I have one problem to be seem very very strangely, has anyone got this problem? I installed Zimbra 5.16 on UBuntu version 8.04(64bit both) successfully, and then I also created 2 account email@example.com & firstname.lastname@example.org and one group email@example.com, it1&it2 to be member of a11it. And then I can send all e-mails locally between it1,it2 and a11it as well, they are delivered correctly. Then I decide to configure Zimbra to be Domain Controller fowllowing this article Zimbra Integration With Samba - Ubuntu Based (Similar To AD And Exchange) | HowtoForge - Linux Howtos and Tutorials. Well when I have finished this article and created new account and I also join that account to my Domain very very well. But at this time I can't send all the local e-mail, I tried to delete it1,it2 & a11it and re-created them but they did'nt work. Could you please tell me how to fix this problem?