URGENT PLZ: Exchange email on Outlook 2003

[Jassim Rahma]

I have an Exchange 2003 user configured on MS Outlook 2003 and a POP3 email
configued on the same PC for the same user. I have set the POP3 as default
but when I send any local internal to other exchange user I am getting:

(First / Last Name) on date & Time
550 Invalid recipient: <[email protected]>


I have the same setting on Office XP on more than 40 PCs with no problem...


I am using:

Windows Xp on the client
Windows 2003 Server
Exchange 2003
Office 2003 on client