Route incoming mail to 2 mail files. use mail journaling?

is it possible to do the following? do i have to use mail journaling?

two 5.x domino servers (we will upgrade to 6 if necessary) – not clustered

incoming mail would be delivered to user X at the following locations:

  1. his main mailfile on domino_1

  2. a copy or replica of his mailfile on domino_2

mail server is domino_1, regular mail file

backup server is domino_2, this server captures all mail delivered to or by user X