> When I send an e-mail to user1@??? or user1@???
> it goes in the same mailbox : user1 My problem is that I
> need to have 2 different mailboxes : One for user1@???
> and another one for user1@???.
This is because Exim router for local delivery doesn't take into
account different domains. So you need to modify and build a
domain based local delivery.
For example a alias file per domain etc.
http://www.exim.org/exim-html-4.50/doc/html/FAQ_4.html
See: Q0405
BR,
Jori