[exim] Exim4 connecting to MS SQL database

Hi Exim users

Has anyone on the list managed to have Exim4 performing lookups to an MS SQL
server for delivery of mail?

We have an MS SQL server with all our user information stored nationaly and
would like to have Exim be able to do looks ups against this and delivery to
the relevant mail server.

Any advise or information would be welcome at this stage.

Many Thanks

Craig