What is considered a "Opened" email?

[SteveC907]

When someone receives an email and views it from the reading pane of their email client, without clicking on it, does this count as an "Opened"?

[William_A · Accepted solution]

Hello @SteveC907 ,

Opens are tracked based on a 1x1 pixel transparent image inserted automatically on all email campaigns. If the recipient's "reading pane" doesn't allow images to download / show, then the open won't be able to be tracked.

[SteveC907]

Thank you for the prompt reply. That explains why some of my customers tell me they saw my email but my campaign shows that they never opened it.