virtual domains

[Rick Glunt]

I have a mail server running qmail and accepting mail for a virtual domain via fastforward (all mail addressed to @mydomain.com is sent to a user).  Mail coming into this server for the virtual domain is being sent to the users mailbox just fine.   Now I want to use this users mailbox as a multidrop box.  Another server (running qmail) connects to the mailbox and retrieves all the mail but then logs messages indicating that the messages retrieved already have a 'delivered_to".  When the messages are put in the users mailbox on the first server the delivered to lines are added thus causing the problem.   How can I get this to work?   Thanks,   Rick