[exim] howto mainlog -= rejectlog

Hello,

the entries in the reject (which are also written into the mainlog) are
creating a lot of noise in mainlog, so its hard to see whats really
going on there. Is it possible to tell exim _not_ to write all entries
of rejectlog into mainlog, too? Or is it possible to write the
not-rejectlog-entries into an acceptlog?

Regards
Marten