Exchange user issue

[MobileTechie]

Client running SBS 2003 using pop3 connectors. We added a new user but had to remove them after a day. Then things got sorted with them and they needed the user added again. I did this and external test emails work fine.

However internal ones are bounced back with the message:

"Your message did not reach some or all of the intended recipients.
Subject: FW:
Sent: 19/10/2012 09:27
The following recipient(s) cannot be reached:
John Smith on 19/10/2012 09:27
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<clientsdomain.co.uk #5.1.1>

On checking out Exchange mailboxes I see that there are two mailboxes with the same name. Purge/Reconnect are greyed out - I'm assuming this is just Exchange orphaning process and not related...or is it?

Any ideas what is happening here?

 

[MobileTechie]

I think I've solved it. It seems that, in the creation of user account the first time around, there was an error with the email address caused by the default email naming polic. The people who emailed the user before the old account was deleted and the new account added have this error in the alias and this is used when they type in the users name into Outlook. Once a mail is forced to use the correct info, it then works OK from then on.