strange issue sending email

When sending an email from outlook 2003/Exchange the mail shows up in both the sent items and the inbox.  Any ideas?!!
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redseatechnologiesConnect With a Mentor Commented:
OK, well first, try wiping out rules (i know you can't see anything there though)

close outlook, then > Start > run > outlook /cleanrules

If that doesn't do it, recreate the mailbox - Exmerge the mailbox out, delete it, recreate it, and reimport it again with exmerge

All users or one user?

Do they have any rules on the mailbox?

Is the recipient forwarding the mail back to the sender?
andreacadiaAuthor Commented:
seems to be only one user, no rules, no forwarding.

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That one user, is it when they send to any particular recipient?

Does the same thing happen when they use OWA?
andreacadiaAuthor Commented:
seems to be any user.  Same thing happens in OWA
andreacadiaAuthor Commented:
mail is getting bounced back from the account as well:

The following recipient(s) could not be reached:

      John Doe on 3/22/2007 9:17 AM
            A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients.  Contact your administrator.
            <server.serverdomain.local #5.4.6>
There is an suspicous event id 3020 that shows up as well.  According to microsoft this may be because a users in on OU has the same email address as the user in another OU but this is not the case
I would be recreating the mailbox then, something has gone screwey there
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