If ndrs have not been enabled , an ndr will not be sent if voice message delivery fails .
如果未启用ndr，则在语音邮件传递失败时不会发送ndr。
If report redirection is set to the distribution group manager , all report request settings are suppressed except ndr messages that are sent to the distribution group manager .
如果报告重定向设置为通讯组主管，将抑制所有报告请求设置，发送给通讯组主管的ndr邮件除外。
The advanced queuing engine must retain the message until at least one transfer path becomes available , or until the message expires and is returned to the sender with an ndr .
Without the deleted routing group object , mail sent to non-existent users will immediately be returned to the sender with an ndr , instead of being added to the queue first .
If , on the contrary , the future rate of interest is uncertain we cannot safely infer that ndr will prove to be equal to 1dn + r / 1dn when the time comes .
