[Exim] Exim 4 and MySQL

Hi list, sorry for talking about this again but I need help.

Is there anybody who can, please, send me a working sample of the
configuration file for Exim 4 looking up users at a MySQL DB?!

I'm in trouble with all the examples and other sources and with the
differencies between 3.x and 4.x... can't make it work...

tks for your help!

Andre Correa
andre.correa@???