[exim] Please help!

         Exim 4.50 .

         Is there a way not to send internal Exim errors 
in bounce
messages? Even hidden data is sent back to sender ;-((
         For example, if some database lookup fails in 
router or
transport configuration, full lookup text, including 
hidden data
is send back to sender.
         I failed to find answer in spec. ;-((

                 Bye. Alex.