[exim] several spamd calls in a row?

Hello,

to increase the relevance of a spamd result, we want to run several
calls to spamd in a row. In fact, it is not one spamd, but several
different spam filters behaving like a spamd.

Is there any way to do it?

This would also be interesting to test a new spamd which uses a
different mail header to show its results.

Regards
Marten