Incomming NDRs are going to all members excepting the message sender

[jacqueslhomme]

I have abn issue on SBS 2003 with exchange 2003 SP2.

if one user sends an email to an unknown receipent the bounce back goes to all users on the domain except the message sender or administrator.

i have looked all over but cannot find a solution.

any ideas?

thanks in advance

Jacques