Command Center

In Outlook, as you start typing a name in the To box, a drop down list may appear, showing names of people to whom you’ve previously sent an email.

Sometimes those names are out of date, and the list includes old email addresses.
In my Outlook drop down lists there are multiple entries for some people – a current address and one or more older addresses. When sending email to those people, I waste time trying to remember which address is the correct one. I’d like to get rid of the old items in the list, so the correct addresses are the only ones left.

Remove the Old Addresses

1. Create a new email message
2. Start typing a name in the To box
3. When the drop down list appears, click the down arrow (or up arrow) key on your keyboard, to move to the name that you want to delete.
4. On the keyboard, click the Delete key.

Now when you start typing the name, the deleted names don’t appear.


REFERENCES
https://msmvps.com/blogs/deborahk/archive/2009/11/09/outlook-sending-to-the-wrong-email-address.aspx
http://blog.contextures.com/archives/2009/01/21/remove-old-addresses-from-outlook-drop-down-list/