Why does my Outlook keep receiving duplicate messages?

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

How can I stop this situation?

The easiest and fastest solution to this problem is to log-in to the mail server via webmail and delete your mail message that is causing the problem – or all of them for a fresh start. (NOTE: make sure that you have downloaded your messages first)

Other things to prevent duplicate emails:

  • 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
  • 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
    Outgoing server (SMTP): 25
    This server requires a secure connection (SSL)
    Server Timeouts (Increase from 1 minute to 10 minutes)
  • Empty the Deleted Items folder only when Outlook is not checking e-mail in the background.
  • Configure Outlook so as not to check e-mail more frequently than ten minutes.
  • 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.

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