[exim] Replacing demime for MIME sanity check?

Hello,

I would like to get rid of using demime. I remember to have read the
new MIME acl does not perform as many checks as demime, but I failed to
find any documentation on how to check for anomalies at all.

There appear two variables "mime_anomaly_text" and "mime_anomaly_level".
Did the documentation get lost in the conversion process to the new
manual format?

Michael