I installed new zimbra server as our mail server ,install compete.
Now i meet a problem:
when I use mail client such as outlook sent mail to outside mail address through this zimbra server ,found error on maillog file :NOQUEUE: reject: RCPT from unknown[*******]: 554 5.7.1.
but when I use web client ,can sent mail to anywhere.
now i alse can receive mail though anther mail server .