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How to Turn On or Off Address Auto-Completion in Windows Mail or Outlook Express

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Having Windows Mail or Outlook Express complete addresses as you start typing in an email's To: field is most convenient — and extremely dangerous.

If two similar names ever fooled you into sending a sensitive message to the wrong person, you may want to prevent similar gaffes in the future. If you always have to type all email addresses by hand, you probably wonder where the convenience is.

Fortunately, Windows Mail and Outlook Express can satisfy both needs: it's easy to turn address auto-completion on or off. If you delete the dangerous address from the auto-complete list, you can even satisfy both needs at the same time.

Turn On or Off Address Auto-Completion in Windows Mail or Outlook Express

To enable or prevent Windows Mail or Outlook Express completing email addresses and contacts as you start typing them when addressing emails:

  • Select Tools | Options... from the menu.
  • Go to the Send tab.
  • Make sure Automatically complete e-mail addresses when composing is checked or not checked.
  • Click OK.
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