Error_messages

 %MAILSERV-W-IVKEYW, unrecognized keyword -
check validity and spelling

     You specified an unknown unit specification. Resend the command
     specifying a legal value for the size-units parameter.

 %MAILSERV-W-NUMBER, invalid numeric value - supply an integer

     An invalid numeric value was supplied for the size-value
     parameter. Resend the command specifying a positive integer
     value.

 %MAILSERV-W-POSITIVE, invalid numeric value - supply a positive integer

     An invalid numeric value was supplied for the size-value
     parameter. Resend the command specifying a positive integer
     value.

 %MAILSERV-W-INSFPRM, missing command parameters

     You failed to specify one or both of the required parameters.
     Resend the command specifying both the size-units and size-
     value parameters.