I'm getting the error below. Can anyone tell me what it means. Thanks.

George Blake
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---------------------------------
The following 1 subscriber is currently being monitored:

Err First Last  Address
--- ----- ----- -------
  2 03/16 03/16 "[log in to unmask] Dr. George Blake"
<[log in to unmask]>
                Last error: No such local user

Err=   Number of delivery errors received thus far
First= Date first delivery error was received (mm/dd)
Last=  Date of most current delivery error (mm/dd)

Note: manually deleted subscribers may remain on the monitoring report
under
an alias address. Such entries will expire eventually; you do not need to
do
anything about them.