When i create domain. The error show The operation you were performing failed. You can retry the operation with or without changing its parameters. You may also want to report this problem to our support so that we could help you as soon as possible. Failed domain creation: Unable to update domain data: Failed mail post-configuration: Can't create mail domain servie: mailManager->addDomain() failed: mailmng failed: MEAOPO.PostOffice.AddPostOffice failed for name smartbs.vn [smartbs.vn] ---------------------- Debug Info ------------------------------- 0: DomainPropertiesUIPointer.php:284 DomainPropertiesUIPointer->accessItem_create(string 'POST') 1: DomainPropertiesUIPointer.php:62 DomainPropertiesUIPointer->accessItem(string 'POST', NULL null) 2: UIPointer.php:601 UIPointer->access(string 'POST') 3: plesk.php:43 Anybody help ? Thanks .