Highlight & hit Delete on them when they appear in the dropdown

"Pilgrim" wrote in message
...
There are many occasions when I send out "1 of" e-mails by typing out the
recipient's address in the "To:" field. But then when I starting typing in
another address which has the same first couple of letters, these
addresses appear in the menu. How can I remove these obsolete
names/addresses so they no longer appear in the choices?