Why do preview and reading panes cause an email address to appear many times on an open report?

Here are a few reasons why you may be seeing one contact listed many times in your open report: When the preview pane is used to view an email, the email is automatically "opened." Therefore, when a contact uses the preview pane to view your email, it could register as an "open" many times within only a minute or two depending on how many times the user viewed it in