loginrealms -- fetching from ldap

[mayak-cq]

hi all,

i have a site that is collecting mail for a large number of domains and
each of these domains serves as a login realm.

my imapd.conf is becoming a bit unmanageable with all the domains.

is there a lookup for 'loginrealms:' that can be used to fetch these
from my ldap?

thanks

m