[exim] linefeeds in check_data acl

Hello,

I'm experiencing, that most spamfilters and virusscanners are expecting
the messages to be in raw format as it has been send after the DATA
command, thus using \r\n for linefeeds instead of \n. But exim seems to
convert \r\n's of the message to \n before sending it to spamd or
av_scanner. Is it possible to disable this, at least for the scan?

Regards
Marten