I use zimbra is ok, but yesterday i add a new domian on the web, and move the users to the new domain,it happy error:
Delivery Failure Notification: Invalid address: xxxx@163.com. com.zimbra.cs.mailbox.MailSender$SafeSendFailedException: 
MESSAGE_NOT_DELIVERED; chained exception is: com.zimbra.cs.mailclient.smtp.InvalidRecipientException: RCPT failed: 
Invalid recipient xxxx@163.com: 554 5.7.1 <xxxx@163.com>: Relay access denied
but, the error doesn't happen to everyone, someone use it is ok!

Who can give me a five? That's very thanks!