For marketers who use Gmail's open rate tracking to see the success of their campaigns, the new changes may affect their trust in the metric. Because email tracking pixels are now preloaded, they no longer accurately reflect when a user actively engages with an email.
Without tracking pixel emails that reflect true open events, email open rates can italy business email list be inflated, resulting in an overestimation of engagement. In turn, marketers may find it difficult to track the effectiveness of their subject lines, email content, and overall campaign performance.
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How to block email tracking in Gmail
As an email recipient, you may be concerned about the privacy implications of email tracking. If you're wondering how to stop Gmail email tracking, there are steps you can take to limit the amount of data third-party trackers can access.
Disable image autoloading: One of the most effective ways to block tracking pixels is to disable image autoloading in your Gmail settings . This will prevent Gmail from automatically loading images (including tracking pixels) in incoming emails.

To disable image autoloading in Gmail:
Open Gmail.
Go to Settings (gear icon) and click See all settings.
In the General tab, scroll down to Images.
Select Ask before showing external images.