Is MailTag Tracking Your Email? Not Since It Went Dark

If you searched "is MailTag tracking my email," the short answer on September 23, 2026 is no, not anymore. MailTag email tracking worked through a Chrome extension that let any Gmail user plant an invisible pixel and rewrite links in outgoing messages, then watch a dashboard light up when you opened them. We probed its servers, pulled its archived privacy policy, and checked its store listings. The product is dark. The technique it sold is not, and the same kind of email tracker for Gmail is still one install away for anyone who emails you.

Key Takeaways

• MailTag tracked opens with an image at app.mailtag.io/email-event/<ID>.png and clicks with a redirect at app.mailtag.io/link-event-v2, according to Internet Archive captures of its tracking host.
• MailTag's archived privacy policy says it collected the recipient's device type, device ID and IP address, along with the recipient's opens, clicks and downloads.
• mailtag.io switched from a working product site on March 26, 2026 to a GoDaddy parking page by May 21, 2026, and app.mailtag.io now returns NXDOMAIN.
• MailTag's Chrome extension ID no longer resolves to a listing, even though its Google Workspace Marketplace page, last updated February 9, 2023, is still online.
• MailTag pixels in old emails can no longer report opens, but Mailtrack, Streak and dozens of other trackers use the same method today.

What Was MailTag?

MailTag was a paid email tracker Chrome extension for Gmail and Google Workspace that combined open tracking, link tracking, scheduled sending and automatic follow ups it called "Pings." Its Google Workspace Marketplace listing promised senders they would "Know which emails have been opened, WHERE they were opened, and how many times the emails have been opened," listed "Location tracking for Gmail™" as a Pro feature, and quoted pricing "from $9.99 per month per user." That listing still shows 18K+ installs.

The Chrome extension was smaller. An archived July 2025 copy of its Chrome Web Store page shows 10,000 users, a 3.9 rating from 233 ratings, and version 2025.0323.1709, updated March 26, 2025. Its homepage pitched the value bluntly, with a customer testimonial about phoning prospects "as soon as they've read my email."

If you have read our breakdown of email tracker Chrome extensions, MailTag fits the familiar pattern: a small subscription tool that turns every recipient into a data point on a sales dashboard.

How Did MailTag Email Tracking Work?

MailTag email tracking worked by adding a unique, invisible image to each tracked message and wrapping each link in a redirect through its own server. Both ran on a single hostname, app.mailtag.io. Captures of that host in the Internet Archive show the two URL shapes clearly:

• Open pixel: https://app.mailtag.io/email-event/<UUID>.png?ts=<number>. The UUID identifies the specific email, and the archive recorded these requests returning a PNG image. When your mail client loaded that image, MailTag logged an open.
• Click redirect: https://app.mailtag.io/link-event-v2?mt__id=<UUID>&mt__url=<destination>. The real link sat inside the mt__url parameter. Archived requests returned an HTTP 302 redirect straight to that destination after MailTag recorded the click.

An older /link-event path also appears in the archive. Nothing here is exotic. It is the same pixel and redirect pair that our guide to detecting email tracking pixels in Gmail walks through, just on MailTag's own domain.

What Could a MailTag Sender See About You?

A MailTag sender could see when you opened their email, how many times you opened it, which links you clicked, and an approximate location. MailTag's archived privacy policy (effective June 25, 2021) is explicit about the recipient side: "If you are using open, click, and download tracking, MailTag collects the recipient's device type, device ID and IP address, along with the recipient's activities (for example: opens, clicks, downloads)." It also collected "the recipient's name, email address and the email subject line" for the sender's dashboard.

You never agreed to any of that. The policy governed MailTag's relationship with its paying users. As the recipient, you were the subject of the data, not a party to the contract.

One caveat matters for Gmail readers. Gmail on the web fetches remote images through Google's own servers, and Google's Gmail help page says "Senders can't use image loading to get information about your computer or location." So when you read a MailTag email in Gmail's web interface, the "WHERE" on the sender's dashboard most likely reflected Google's infrastructure, not your home. The same page concedes the part that matters most: "Sometimes, senders may know whether you've opened an email that has an image." Timing and repeat opens still leaked. Link clicks were worse, because a click opens the redirect in your own browser, from your own IP address.

Is MailTag Still Running in 2026?

No, MailTag does not appear to be running in September 2026. Every public signal we checked points the same way:

• The website is parked. The Internet Archive shows the full MailTag product site on March 26, 2026 and a redirect to a parking "lander" on May 21, 2026. Today mailtag.io serves GoDaddy's parking page. The domain registration was renewed through 2028, so someone still holds it.
• The tracking host is gone. Our DNS lookups for app.mailtag.io, api.mailtag.io and track.mailtag.io all returned NXDOMAIN. A nonsense control subdomain returned NXDOMAIN as well, which rules out a wildcard record. The root domain still resolves, but only to the parking page.
• The Chrome extension is unlisted. The MailTag extension ID now opens the same empty Chrome Web Store page as an ID we made up. A live tracker extension used as a control rendered normally. Google's update server answers the MailTag ID with an empty response rather than a package.
• One listing lingers. The Google Workspace Marketplace page is still online, last updated February 9, 2023. We did not install it, and we would not recommend trying.

We could not find an announcement or a stated reason for the shutdown. The ownership trail is murky. On Capterra, the vendor replied to complaints on August 2, 2019 with "We acquired MailTag 2 weeks ago." The site footer later credited AppLab BCJS LLC. The Chrome Web Store listed the developer as Vikai Ventures, LLC in an April 2024 snapshot and Raiden Ventures, LLC in July 2025. That makes three company names on the same tracker in about three years, each of them handling the IP addresses of people who never signed up.

Can You Tell If an Email Was Tracked by MailTag?

Yes, you can tell by looking at the raw message source. In Gmail, open the email, click the three dot menu, and choose Show original. Then search the page for mailtag.io. A hit on email-event means the message carried an open pixel. A hit on link-event-v2 means its links were wrapped. The same check works for other trackers, as our guide to spotting tracking pixels in Gmail shows.

Now that app.mailtag.io no longer resolves, wrapped links in old emails are dead ends: clicking one goes nowhere. The original destination is still sitting in the URL. Copy the link address, find the text after mt__url=, and URL decode it (turn %3A back into a colon and %2F into a slash). That gives you the real link without asking a defunct server for permission.

What MailTag's Exit Means for Your Inbox

MailTag disappearing does not make your inbox meaningfully more private. Most coverage of dead apps stops at "it's gone," but a tracker shutting down is not the same as tracking shrinking. Senders who relied on MailTag did not stop wanting read receipts. They moved to tools that are very much alive, such as the ones in our comparison of Gmail read receipt trackers or the most installed of them all, covered in our look at whether Mailtrack is safe. Marketing platforms add their own pixels on top. Princeton researchers found that "About 30% of emails leak the recipient's email address to one or more of these third parties when they are viewed," in a 2018 Privacy Enhancing Technologies Symposium paper.

There is also a quieter risk in your archive. Every MailTag email you ever received still contains a pixel pointing at app.mailtag.io, and Gmail will try to fetch it each time you reopen that message. Today those requests fail. But mailtag.io is registered through 2028 and parked, and whoever controls a domain controls its subdomains. If it changes hands and app.mailtag.io is pointed somewhere again, those old pixels would start reporting reopens to a stranger. The new owner would not have MailTag's database to map IDs to senders, and Gmail's image proxy would hide your IP, so the practical exposure is small. It is still a good illustration of why a pixel's risk outlives the company that planted it.

The flip side applies to blockers. A tracker blocklist that nobody maintains decays the same way MailTag did. When we checked on September 23, 2026, the Chrome Web Store listing for Ugly Email, one of the best known free blockers, returned the same empty page as MailTag's.

How to Block MailTag and the Trackers That Replaced It

You do not need to do anything about MailTag specifically anymore. You do need a plan for the email trackers still operating. Our full guide on how to block email tracking in Gmail goes deeper, but these are the practical options:

1. Turn off automatic images in Gmail. Per Google's instructions, open Settings, then See all settings, scroll to "Images," choose "Ask before displaying external images," and save. Pixels stop loading, but so does every newsletter photo and receipt logo until you click "Display images below."
2. Do not rely on Gmail's image proxy alone. It hides your IP address and location, not the fact or timing of the open.
3. Check links before clicking. Hover over a link and look at the status bar. If the domain is not the site you expect and the URL carries the real address as a parameter, it is a tracking redirect.
4. Install a tracker blocker that is actually maintained. Compare the options below.

Each of these beats doing nothing, and we have compared the free three in more depth in our Ugly Email, PixelBlock and Trocker alternatives guide. Trocker is the strongest free pick if you read mail outside Gmail. Gblock is built for people who live in Gmail and do not want to babysit a blocklist: when a tracker like MailTag appears, changes hosts, or dies, the list updates without a new install. One honest limit: Gblock's click protection hides your IP address and device from the tracker, but a redirect service can still log that a click happened.

The Bottom Line on MailTag

MailTag is not tracking your email in 2026, because its tracking servers no longer exist. Since at least 2018, it logged the device, IP address and reading habits of people who never agreed to anything, while ownership changed hands behind a series of LLC names. The tool died; the business model did not. If you want to see who is still watching your opens, start with our guide to email trackers for Gmail and pick a blocker that someone is still maintaining.