[Exim] exim rerouting messages depending on 450/550 result a…

Hello,

At home i'm on cable modem. this is a ip listed
on "dsl/cable dynamic ip".

sometimes other mta are using this list to refuse mail.

i could use the isp mta that i don't trust.

is there a possibility to reroute (say, using a
smart host, or a different ip route) a message
which was refused on the other side ?

thanks

--
xavier renaut