Opens and implicit opens explained

Your campaign's been opened, but the report shows nothing - how? The answer is in how opens are tracked, and the difference between an open and an implicit open. Understanding it stops you misreading your numbers.

What counts as an "open"

An open is recorded when a recipient displays (downloads) an image in your campaign. That's the catch: the recipient has to allow images for the open to register. Because tracking works per image, you can see several opens from one person - and anti-spam filters checking your links can register a burst of opens in a very short window too.

What's an "implicit open"?

An implicit open is counted when someone clicks a link in your campaign without ever displaying the images. They've clearly opened it - they clicked - so it's counted, even though the image-based pixel never fired.

Get the most accurate picture

Encourage your contacts to always display your images, and to add you as a safe sender - both improve how reliably opens are tracked. For the detail, open a delivered campaign and check the Contact Activity tab.

Troubleshooting

Open rates look unusually low - image-heavy emails only register an open once images load, so remind subscribers to enable images, look at your implicit opens (clicks without opens), and remember privacy features like Apple Mail Privacy Protection distort the figure.

Multiple opens from one recipient - that's normal: opens count each time images load, filters can add some, and people view on more than one device.

Open rates changed dramatically overnight - Apple Mail Privacy Protection can inflate them, and a major provider changing its image-loading policy can shift them. Check your tracking pixel is firing.

Improving accuracy - get added to address books, write compelling preview text, balance images and text, and lean on clicks and conversions as your more reliable metrics.

For the benchmarks, see Understand open rates.