[Exim] Exim pipe failure and recovery

Hi,

I would like a director calling a pipe transport, but if
and only if the pipe fails, I would like to run another
director which in turn calls another pipe transport.

One more thing, when disabling the ignore_status option
(disabled by default), the error message bounced to the
sender gives far too much details about the error. I just
would like to give the failed addresses which seems not to
be possible, even when errmsg_file or the inline version
of it. Anything I can do ?

Thanks