[Exim] to: header rewriting

hi ppl,

i use exim with exiscan and drweb, and now i got a following problem:
if i in smtp time enter
"rcpt to:email@domain"
then in message i recive in "to:" field i see email@domain
instead of original recipient, original recipient still specified in
envelop-to header, but some client software can't filter incoming mail
on envelop-to field and they appears in trouble.
can i store original to: field in this letters?

--
С уважением,
 Ury                          mailto:ury@iptel.by