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Does the Preview Pane count as an opened email?

Knowledge Article Number 000003064

I would like to know if the recipient of a mass HTML email reads it in their preview pane of Outlook, will this be counted in the number of times opened tracking?


Yes, email previewed counts as opened.

The reason for this is that when an HTML email is sent an "invisible" (1x1 pixel) image is added to the message.
The message counts as open every time that the recipient request this pixel from the server.

Using the Preview Pane, every time that the email is displayed Outlook (or any other Email client) will request the pixel from Salesforce, counting as opened.

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