About Open Tracking

Open tracking allows you to see if your subscribers have opened your sent campaigns. Your campaign report will show which subscribers opened your campaign, and how many total opens the campaign received.

Compare open results to other data in your account, such as e-commerce activity, to learn about subscriber behavior. You can use open statistics to segment your list, target subscribers, and send follow-up emails.

In this article, you'll learn about open tracking, how to view open results for your campaigns, and how to disable open tracking.

How Open Tracking Works

When you send campaigns through MailChimp, we embed a tiny invisible graphic in the bottom of your HTML email. This open tracker graphic, or web beacon, is unique to each campaign you send. When someone opens your email and views the images within it, that graphic is downloaded from our server, and it's recorded as an open on your campaign report. Automated replies, such as out-of-office messages, generally do not download this graphic, so they shouldn't count as opens.

Web beacon trafficking is the industry standard for open tracking and is a great tool to give you a general overview of your subscriber engagement, but it does have some limitations. Because it relies on a hidden graphic embedded in your campaign code, open tracking won't work in Plain-Text Campaigns. Similarly, open tracking won't work if your subscribers or their email client have chosen not to display images. You can ask your subscribers to add you to their address book, or choose to display images in their email client to get more accurate open tracking.

Access Open Results

There are two ways to access your open results from the Reports page in your account. The open results on the Overview tab include numerical totals for all of your subscribers, while the results from the Opened and Didn't open tabs show you the individual subscribers who opened or didn't open your campaign.

Open Results from the Report Overview

To view the open rate and total number of opens from the report Overview, follow these steps.

  1. Navigate to the Reports page in your account.
  2. Click the name of the campaign you want to work with.

We'll display the Open rate and Click rate on the Overview tab, as well as the total numbers for opens and clicks.


Here are a few terms related to open tracking that appear on the Overview tab, along with their definitions.

  • Open rate
    Percentage of total recipients (successful deliveries) who opened the campaign.
  • Opened
    Number of recipients that opened the campaign any number of times.
  • Total opens
    Total number of times the campaign was opened by recipients. This count includes multiple opens from individual recipients.
  • Forward opens
    How many times the campaign was opened by a recipient who was forwarded the campaign using a Forward to a Friend link. Only campaigns forwarded using the Forward to a Friend link can be tracked as a forward open. Campaigns forwarded using an email provider's forward button will not be counted as a forward open.
  • Last opened
    The most recent instance of a recipient opening the campaign.
  • Subscribers with most opens
    Subscribers that opened the campaign the most times.

Open Results on the Opened and Didn't open Tabs

To view which individual subscribers did or didn't open a campaign, follow these steps.

  1. Navigate to the Reports page in your account.
  2. Click the name of the campaign you want to work with.
  3. On the Overview tab, click the Activity drop-down menu and choose Opened or Didn't open.

These screens will display a full list of recipients that either did or did not open your campaign.

To download a CSV file of the list of recipients you're viewing, click Export.

You can also hover over the open or click percentage for each campaign on the Reports, Campaigns, or Automation pages in your account to view the exact number of subscribers for that statistic.

Disable Open Tracking

Open tracking is enabled by default except on Plain-Text Campaigns. To disable open tracking for a campaign, follow these steps.

  1. Navigate to the Setup step of the Campaign Builder.
  2. Click the Track opens box under the Tracking heading so that the box is not checked.

Troubleshoot Open Tracking

If it seems like your opens are being incorrectly tracked on your campaign report, there are a few things that could be happening.

My open rates seem low or non-existent.

Here are some common issues that can block open tracking or cause your open rates to be low.

  • Was open tracking enabled for your campaign?
    Open tracking must be enabled before the campaign is sent to track opens in the campaign report. If open tracking was disabled for a campaign, there will be a notification at the top of the campaign report Overview.
  • Have your subscribers had enough time to open the message?
    It's common to see a low open rate in the first few moments after a send, so we recommend waiting at least a few hours to view open rates to give subscribers some time to check their inbox and open your message.
  • Was the campaign a Plain-Text Campaign?
    Open tracking relies on a hidden graphic that downloads when a subscriber opens your campaign. Because plain-text emails don't support images or graphics of any kind, opens can't be tracked.
  • The tracking image may be blocked.
    In rare cases, your recipients' spam filters may block our tracking image. However, when subscribers click a link in your campaign, we count that as an open if click tracking is enabled. If you think your tracking beacon is being blocked, we recommend you enable both open and click tracking to keep track of opens. Keep in mind your stats may not be 100% accurate, but will give you some usable statistics on your subscriber activity.
  • Gmail has clipped your message.
    If an email message is too large, Gmail will clip content and hide it behind a View entire message link. When the message is clipped, it also clips the tracking code that accounts for opens. To prevent this, reduce your message size to below 102kb.

My open rates seem high.

Here are some common issues that can cause your open rates to be too high.

  • A spam filter is causing high open rates.
    Aggressive spam filters will click links in incoming mail before delivering them to make sure there isn't any malicious content. Our system automatically tracks clicks as opens, and we have no way of differentiating when a click is from a spam filter. This can sometimes lead to an unusually high number of opens from a single domain. If you notice this on your report, it's likely the result of a spam filter. We recommend you ask your subscribers to whitelist MailChimp’s servers.
  • Your subscriber forwarded your email.
    When your subscribers forward emails through their email client, any opens for the forwarded email are recorded as additional opens for your subscriber. Encourage subscribers to use the Forward to a Friend link instead to accurately track your opens.

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