Help please with Vista mailboxes

[#1]

Help please.
We have our default e-mail (username@username.plus.com)  and 4 other mailboxes (username+name@.....). With our new Vista we have 4 user accounts, each of which has its own mailbox and one of them also has the default mailbox. On testing out this arrangement, mail to the default address also appears in the other mailbox on this user account and vice versa, therefore it seems that Vista Windows Mail is treating the 2 mailboxes as the same one. Is this correct, or are we doing something wrong?

[#2]

Hi,
Not sure exactly what's happening but first thing I would check is in the mail properties (Tools -> Accounts -> Mail -> Properties -> Servers) to ensure that the usernames are unique on each profile, it sounds a bit like there may be a duplicate username in there somewhere.

[#3]

Thanks. I'll check the user names, though I think that they are different.
philewer