/QUOTA=value
       /NOQUOTA

    Change the account's message storage quota. The account can
    continue to receive new messages so long as the storage consumed
    by its currently stored messages does not exceed its message
    storage quota. See also /OVERDRAFT.

    A quota value of zero, as specified with /NOQUOTA or /QUOTA=0,
    conveys unlimited storage. That is, to grant an account unlimited
    storage set its quota to zero.

    A quota value of zero, conveys unlimited storage. That is, to
    grant an account unlimited storage set its quota to zero.

    By default, this quantity is specified in units of kbytes;
    however, the SET STORAGE_UNITS command can be used to change
    the units used.

    The maximum value is 4 gigabytes minus 1. If the value specified
    exceeds the maximum, the value is set to zero (unlimited quota).