[exim] time-of-day ACLs

I'd like to be able to deny access to specific users at specific times of
day.

For example, user Joe might have access during the following hours (local
time):

0600-0745
1700-1900
2000-2145

At times other than these Joe's access to the smtp server should be
denied. I'd like to be able to do this on a per-user basis.

--Yan

--
Yan Seiner, PE