Duplicate incoming emails on a backup server ?

[Frank Bonnet]

Hello

Would it be possible to duplicate all incoming email
for a domain to two mailhubs ?

                                            |------------> prod mailhub
 ncoming emails --> MX  ---|
                                            |------------> bkup mailhub

I imagine the best would be to use transport from the MX
to do so, but I prefer ask experts advices as I don't want
to screw up my actual production server :-)

Thank you.