Subject:  Outlook XP Downloads Duplicate POP3 Messages 
From:     Pamela Y. C. Fong
Date:     Wed Nov 19 11:15:53 PST 2003


There are a couple of situations which may cause Outlook XP to download duplicate
messages:

KB290043: Outlook Downloads Duplicate POP3 Messages After Exchange Server Is
Temporarily Offline
http://support.microsoft.com/default.aspx?scid=kb;en-us;290043

KB292249: Outlook Downloads Messages from a POP3 Server Twice
http://support.microsoft.com/default.aspx?scid=kb;en-us;292249

KB317945: Mail Retrieval Problems Occur When You Receive POP Mail
http://support.microsoft.com/default.aspx?scid=kb;en-us;317945

KB284404: Password Prompt, Duplicate Messages Appear If Outlook Profile Has Two POP3 Accounts
http://support.microsoft.com/default.aspx?scid=kb;en-us;284404&Product=ol2002

KB289942: POP3 Headers Are Duplicated 
http://support.microsoft.com/default.aspx?scid=kb;en-us;289942&Product=ol2002


These procedures may alleviate these symptoms.

0)  Windows Systems Administrators should be aware that rebooting Exchange Servers
    can result in their users receiving duplicate messages.  Users should be aware
    that rebooting is neccessary on occasion, to install Windows patches and
    updates, and so duplicate message conditions may arise from time to time. 

1)  If you are using ITS POP server, verify your POP and SMTP server settings:

      POP Server:  pop-server.its.caltech.edu
      SMTP Server:  smtp-server.its.caltech.edu

2)  Download and install the latest Microsoft Office XP Service Pack and
    Patches.  This is most easily done by accessing the link to Office Update
    from,

      http://windowsupdate.microsoft.com

3)  Increase your server timeout settings to 10 minutes:

      Tools|E-mail accounts
        View or change existing e-mail accounts
          Select the account corresponding to your ITS UNIX account
            Click the Change button.
              E-mail Accounts
                More Settings
                  Internet E-mail Settings
                    Outgoing Server
                      My outgoing server (SMTP) requires authentication
                        Use same settings as my incoming mail server
                    Advanced
                      Outgoing server (SMTP): 25
                      This server requires a secure connection (SSL)
                      Server Timeouts (Increase from 1 minute to 10 minutes)

4)  Empty the Deleted Items folder only when Outlook is not checking e-mail
    in the background. 

5)  Configure Outlook so as not to check e-mail more frequently than ten
    minutes.

6)  Configure Outlook to download complete Item including attachments.
      Tools|Send/Receive settings
      Define Send/Receive groups.
      Click to select the group name, and then click Edit.
      Under Accounts, click to select the POP3 account.
        Download complete Item including attachments.

---Pam