How to tell which email item fired the event

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Author: invalid@example.com (oldprogrammer1234)
Language: English
Channel Number: 58083570
Article Number: 108
Date: November 16, 2009, 9:08 am
URL: https://www.pcreview.co.uk/threads/how-to-tell-which-email-item-fired-the-event.3924514/
GUID: https://www.pcreview.co.uk/threads/how-to-tell-which-email-item-fired-the-event.3924514/