[exim] distribution list in LDAP

Hello,

I want to use distribution lists stored in LDAP (ADS). The
list has an email address to which the mail is send to. The
DNs of all member are stored in the attribute member. I want
to resolve these DNs into email addresses. The address for
each entry is stored in the attribute mail. I think I have seen
a solution a long time ago but i can not remember where.
Can anyone point me into the right direction (best without using
a Perl function).

Thx,
Jan