[exim] S/MIME with exim filter ?

Hello all!

Does anyone know if its possible to s/mime (digitally sign) every outbound
message with a specific certificate via exim transport filter?
I have tried "openssl smime" without success (because openssl cannot sign a
mailformat-email on the fly and also there seems to be a bug with the CRLF).

Is there any solution or idea i can follow ?


Thanks and regards,
Juergen