How do I remove previous requests of "receipt of email" in Outlook 2007?

Right now I am traveling overseas and am using my same email address to receive, but a different internet provider to send emails. One friend's email always ask for "a receipt" that this email has been received. I inadvertently said yes to about 6 emails at different times. Now when I am in Outlook 2007 and click "send/receive," it automatically is trying to "send" these receipts, although there is no "email" in my Outbox. How can I "purge" or remove these previous requests, so that Outlook is not trying to send these?
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Pete_ZedConnect With a Mentor Commented:
You can use a program called Outlook Spy which you can download free with full functionality for 30 days. Here are some instructions:

Ezra7_10Author Commented:
Awesome! So easy, and yet, it took care of an annoying problem! Thanks!
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