My exchange account can't send email to stringed lists, I receive bounce backs

• Sending email from my Exchange account to stringed lists such as @ll, @mtl, etc, fails to deliver email to those recipients or distribution lists

Context

• The N2K file is a cache of all "sent to" recipients

Answer

1. Close Outlook
2. Set the system to show hidden files and folders
3. Control Panel > Folder Options > View > Show hidden files and folders > OK
4. Find the N2K file:
   C:\Documents and Settings\UserID\Application Data\Microsoft\Outlook\outlook.nk2 and/or exchange.nk2
5. Rename to exchange.bak
6. Restart Outlook
7. A new file will be created
8. Send a test message