Elizabeth, you wrote on Sun, 15 Jan 2006 15:31:01 -0800:

I sent a couple of messages..using Microsoft Outlook to a person using YAHOO
... I went to my navigation field, to the sent folder and double clicked the
sent email....I went to options and checked, "recall msg" and I then told the
computer to delete unread msgs. I do know this person has not read their
email, been out of town...so my questions a

1) How can I ensure the email I sent was deleted?

The feature "Recall Message" is only available in an exchange
eniviroment. If you use Outlook with an POP3/IMAP-Account instead,
there is no way to recall the message.

2) Does the original sent email still show up in their inbox?

The message will be shown in recipient's inbox, when he fetches its
SMTP-Server or - when the recipient does not use an email-client -,
when he fetches mails over the webinterface of its provider. You have
no chance to prevent that he will see the message in his inbox, unless
you have access to his inbox ;-).

--
Best Regards
Christian Goeller