Is Omnisend Tracking Your Email? How to Block It

That abandoned cart reminder in your inbox isn't just a nudge to finish checkout. If it came from an ecommerce store running Omnisend, it likely arrived with an invisible tracking pixel and rewritten links designed to report back the moment you opened it and everything you clicked. Omnisend email tracking runs quietly behind roughly 27 billion messages a year, and almost nobody who receives them knows it's happening.

Omnisend is the email and SMS marketing platform embedded in more than 150,000 Shopify, BigCommerce, and WooCommerce stores. If you've bought anything online from an independent retailer in the last few years, there's a good chance an Omnisend campaign has already logged whether you opened it.

Key Takeaways

• Omnisend sent 27 billion emails, 321 million SMS messages, and 458 million push notifications on behalf of 150,000+ ecommerce brands in 2025, embedding an open tracking pixel in nearly every campaign, per Omnisend's own 2026 report.
• Every link inside an Omnisend campaign is rewritten to route through a tracking domain before redirecting to its real destination, letting the sender log exactly which link was clicked and when.
• Litmus' May 2025 Email Client Market Share Report found Apple Mail Privacy Protection now accounts for more than half of all email opens, meaning most "opens" platforms like Omnisend record are automated prefetches, not real reads.
• Omnisend's Sales Attribution Logic only credits a campaign with a purchase if the subscriber opened or clicked it first, giving stores a direct revenue incentive to keep tracking active.
• A free Chrome extension can strip Omnisend's open pixel inside Gmail before it loads, with no cooperation required from the sending store.

Does Omnisend Track Email Opens?

Yes. Omnisend embeds a 1x1 transparent tracking pixel in the HTML of its promotional email campaigns, the same open tracking mechanism used across the email marketing industry. When your email client renders the image, Omnisend's servers log that a request came from your device, timestamp it, and mark the message as "opened" in the store's campaign report.

This isn't a hidden or unusual feature—Omnisend documents open and click reporting openly for its merchant customers, showing them exactly how to monitor campaign performance including per contact open and click activity. The problem isn't that it exists; it's that the recipient—you—never sees or consents to it. Note that open tracking is not available for SMS campaigns, only for email, so the pixel is specifically an email phenomenon.

How Does Omnisend's Click Tracking Work?

Every link inside an Omnisend campaign—the "Shop Now" button, a product image, even the unsubscribe link—gets rewritten before the email is sent. When you click, you're briefly routed through a tracking domain, Omnisend logs the click against your contact profile, and then you're redirected to the real destination in milliseconds, according to Omnisend's own documentation on link domains.

By default, that redirect runs through a shared domain Omnisend controls. Larger merchants can configure a branded click tracking domain (a subdomain of their own site) instead, which makes the tracking link look more trustworthy and less like third party infrastructure—a detail worth knowing if you're trying to spot tracked links by eyeballing the URL, since the domain won't always look obviously foreign to the sender.

If this sounds familiar, it should: the same link rewriting trick shows up across nearly every marketing platform in this space, including Intercom's click tracking, which uses an almost identical redirect and forward pattern. And it isn't a Gmail specific problem—it works the same way in Outlook.com and Yahoo Mail, because it's a structural feature of how marketing platforms build links.

What Data Does Omnisend Collect When You Open an Email?

At minimum: a timestamp, your approximate open count, and—through click tracking—which specific links you interacted with and in what order. Omnisend merges this activity into a single Contact Profile per subscriber, alongside order history, so a store's marketing team sees your email engagement sitting next to what you actually bought.

Omnisend also layers a separate, more invasive tracking system on top called Live View and website tracking. This is a JavaScript snippet installed directly on the store's website (not inside the email), and it logs page views, product browsing, and cart activity for any visitor who has been identified—meaning anyone who's ever entered their email on that site. According to Omnisend's help documentation, this activity timeline shows browsing behavior from the last seven days directly on the same profile as your email opens and clicks. So the email pixel is really just one input into a broader behavioral profile the store is building on you.

How Does Apple Mail Privacy Protection Affect Omnisend's Numbers?

It makes Omnisend's open data mostly meaningless as a signal of genuine human attention—but the tracking still fires. Apple Mail Privacy Protection (MPP) prefetches images, including tracking pixels, the moment an email arrives, regardless of whether the recipient ever actually opens it. Litmus' May 2025 Email Client Market Share Report found MPP now accounts for more than half of all email opens industry wide, which means the majority of "opens" any marketing platform records today are automated, not human.

Omnisend's own support documentation concedes the point directly, stating that with iOS 15 changes, "you can no longer identify whether a customer opened an email themselves or if the system auto-loaded it," according to Omnisend's guide to iOS 15 changes. Omnisend's Campaign Booster feature—which automatically resends campaigns to people who didn't open the first send—now excludes Apple Mail clients entirely, because the platform can't tell who's genuinely uninterested versus who was just auto opened by Apple's proxy.

The irony: even though Apple's privacy feature makes Omnisend's own open metrics unreliable, the pixel still loads and still fires for every recipient outside Apple Mail, and click tracking is unaffected by MPP entirely—it captures real behavior every time.

Why Email Users Should Care

This isn't abstract. If you've ever bought a candle, a t-shirt, or a skincare product from a small or mid size online store, there's a real chance that store runs Omnisend, and every promotional email since has been quietly reporting your open and click behavior back to a marketing dashboard. Multiply that by the dozens of ecommerce newsletters sitting in a typical inbox and you get a detailed, cross store behavioral profile assembled without a single explicit opt in for tracking itself—only for the newsletter.

The commercial incentive compounds the problem. Omnisend's Sales Attribution Logic only credits a campaign with a sale if the subscriber engaged with it—opened or clicked—before purchasing. That means tracking isn't a side effect of Omnisend's platform; it's load bearing infrastructure for how the store measures whether its marketing spend is working. Merchants have no reason to turn it off, and most default configurations don't give recipients any visible way to know it's on.

This is exactly the gap Gblock's guide to blocking spy pixels in Gmail was built to close—putting the choice back with the person reading the email, not the store sending it.

How Can You Tell an Email Was Sent With Omnisend?

A few tells, though none are foolproof on their own. Free Omnisend accounts display a "Powered by Omnisend" badge in the email footer—but the majority of Omnisend's 150,000+ customers are on paid plans, where that badge is removed, so its absence tells you nothing. More reliable signs: an unsubscribe link that leads to a generic Omnisend hosted confirmation page rather than the store's own domain, and clickable links whose underlying URL (visible by hovering, or by viewing the email's original source in Gmail) redirects through a tracking subdomain before landing on the store's actual page.

None of this matters much in practice, though, because the fix doesn't depend on correctly identifying the sender—a properly configured blocker strips tracking pixels and neutralizes tracked links from any sender, Omnisend included.

How Do You Block Omnisend Email Tracking?

You have several real options, each with tradeoffs:

• Gblock blocks Omnisend's tracking pixel—and pixels from virtually every other marketing platform—before it loads inside Gmail, using an auto updating blocklist so newly rotated tracking domains keep getting caught without you doing anything. It also flags rewritten tracking links so you can see where a "Shop Now" button actually points before you click.
• Gmail's own image settings (Settings → General → Images → "Ask before displaying external images") stop images from auto loading, which blocks the pixel—but it also breaks legitimate product images in every email, and you'll be clicking "Display images" constantly.
• Ugly Email and PixelBlock are established open source Chrome extensions that flag or block tracking pixels in Gmail; they're solid for basic pixel detection but generally don't address rewritten click tracking links the way a dedicated tool does.
• Trocker takes a similar pixel blocking approach with a lighter footprint, worth trying if you want a minimal extension.
• Proton Mail blocks remote content, including tracking pixels, by default at the mail client level—a strong option if you're willing to migrate away from Gmail entirely.
• Apple Mail Privacy Protection already blunts pixel accuracy for Apple Mail users, but as covered above, it doesn't stop click tracking, and it only protects you inside Apple's own mail apps.

How Does Gblock Compare to Ugly Email, PixelBlock, and Trocker?

The honest answer is that all four tools block the basic open pixel reasonably well—that part of the problem is largely solved technology. The differentiation shows up in maintenance and scope. Marketing platforms like Omnisend periodically rotate tracking domains and subdomains, and blocklists that aren't actively maintained fall behind. Gblock's blocklist updates automatically rather than relying on infrequent manual pushes, and it extends coverage to tracked links, not just pixels—a gap in some lighter extensions. None of these tools can stop a store from tracking clicks server side once you've landed on their website (that's what Omnisend's Live View captures), so pair any pixel blocker with normal browsing hygiene if that's a concern.

The Bottom Line

Omnisend email tracking is default behavior for one of the largest ecommerce marketing platforms on the internet, running quietly behind roughly 74 million messages a day. The pixel, the rewritten links, and the browsing data all feed a single contact profile that most recipients never see and never agreed to build. You can't opt out from the sender's side of most marketing lists, but you can stop the tracking from working on your end.

Install a Gmail privacy extension like Gblock to strip tracking pixels before they load, hover over links before clicking to spot rewritten redirects, and check out our comparison of email tracker Chrome extensions if you want to weigh every option side by side. Your inbox shouldn't be reporting back to every store you've ever bought from—block the tracking and take that back.