[exim] prevent more than 100 outbound mails for each user

Hi,

I am trying to prevent to user for sending outbound mails from server at
the rate of 100 mails per hours

authenticated = *
    deny ratelimit = 100 / 1h / per_rcpt / strict / $authenticated_id
    log_message = Rejected $authenticated_id due over rate with
$sender_rate/$sender_rate_period
    message = Rate limited

but is is denied the incoming mail too so i want to set the restrict only
for outbound with each mail id not for inbound can any one lhelp me.

Thanks in advance.