%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.