All messages marked as unread?

Hi,

We are using Outlook 2003 with Exchange 2003 on the backend. One of my
users wanted to send out a piece of marketing email but wanted the return
address to generic and not have a user's name associated with it. Yeah, I
know, it's spam but it is very narrowly targeted.

At any rate, I setup another email account for the generic header and to
allow her to send the message I had to use an actual domain login account
for the user name and password to authenticate to our Exchange server. So I
used a test account I use and this worked well, until we realized that every
time I sent a test message to the test user account it got redirected to
her. Very annoying to both of us.

So I changed the account and used her actual domain login credentials which
fixed the first problem. Now, however, every time Outlook polls the
Exchange server it sets all the messages in her inbox to be unread. She
would manually mark them all as read and within a minute or two they'd all
get set back to unread. Obviously this is quite annoying too. So for now I
changed it back to the test accounts credentials.

Question is, how can I use her credentials and not have it change the read
status of all her messages?

The secondary account is a POP3 account, I didn't know what else to use.
Any suggestions? Or is there a better way to handle this setup?

Thanks in advance,
Linn