[exim] Last delivery message in exim -H file?

Hi

Is it possible to let Exim keep a record of the last delivery failure
message in its -H file? Right now I have to log in to the syslog-server to
check why a message has not been delivered within a couple of days by
grepping the log files......

Or is there already a way to find this our per message in the queue ?

bye,
Chris