You open a newsletter, skim it for ten seconds, and close it. Somewhere, a dashboard has already recorded that you opened it, roughly when, on what kind of device, and often in which city. You never clicked “allow.” This is email tracking, and it is far more common than most people realize.
This guide explains how email tracking works, why it matters, and exactly how to stop it, whether you use Gmail, Outlook, Apple Mail, Yahoo, Thunderbird, or Proton Mail. It also reviews the best email tracking control tools so you can pick the right one for your needs.
What Is Email Tracking?
Email tracking is the practice of embedding invisible elements in an email so the sender can learn how you interact with it. Marketers use it to measure campaign performance. Salespeople use it to know when to follow up. Unfortunately, it also collects personal data without clear consent.
The typical data points collected include:
- Whether and when you opened the email
- How many times you opened it, and how long you kept it open
- Your approximate location, based on IP address
- Your device type, operating system and email app
- Which links you clicked
- Whether you forwarded the message
How Email Tracking Works
Understanding the mechanics makes it easier to block them. There are three main methods.
1. Tracking pixels (spy pixels)
A tracking pixel is a tiny image, usually 1×1 pixels and often transparent, hosted on the sender’s server. Each copy of the email contains a unique image URL. When your email app downloads the image to display the message, the server logs the request along with your IP address, device information and timestamp. That single request is the “open” event.
2. Tracked links
Most marketing emails wrap links in redirect URLs. When you click, your browser first visits the sender’s tracking server, which records the click and your identity, then forwards you to the real page. Links may also carry parameters such as UTM tags or unique subscriber IDs.
3. Other techniques
Less common methods include personalized fonts or stylesheets loaded from remote servers, read-receipt requests that ask your app to confirm you opened the message, and tracked file attachments or documents hosted at unique links.
Why Should You Stop Email Tracking?
People search for how to stop email tracking for different reasons. The most common are:
- Privacy: Your reading habits, schedule and location should not be a data source for strangers.
- Data profiling: Open and click data are often combined with other information to build detailed profiles used for targeted advertising.
- Location exposure: IP addresses can reveal your city or region, and sometimes your workplace.
- Pressure and manipulation: Senders can see exactly when you read a message, which can be used for aggressive follow-ups or pressure tactics.
- Security: Confirming that your address is active tells scammers it is worth targeting. Tracking pixels in phishing emails are a common way to validate live addresses.
- Principle: You should decide who learns what about you.
Step-by-Step: How to Stop Email Tracking
The single most effective step is to stop your email app from automatically loading remote images, since that is what triggers most pixels. Below are instructions for popular platforms. Menu names change occasionally, so look for similarly named options if yours differs.
Gmail (web)
- Open Gmail and click the gear icon, then See all settings.
- In the General tab, find the Images section.
- Select Ask before displaying external images.
- Scroll down and click Save Changes.
Note: By default, Gmail routes images through Google’s own proxy servers. This hides your IP address from the sender, but the sender may still register that an open happened. Turning off automatic image loading prevents even that.
Gmail (mobile app)
- Tap the menu icon, then Settings, and choose your account.
- Scroll to Images and select Ask before showing external images.
Outlook (desktop)
- Go to File > Options > Trust Center > Trust Center Settings.
- Choose Automatic Download.
- Tick Don’t download pictures automatically in standard HTML email messages or RSS items.
- Click OK.
Outlook.com and Outlook on the web
Open Settings > Mail > Junk email or the Message handling section, and look for the option to block external images or to ask before loading them. Microsoft updates this interface often, so use the settings search box and type “images” if you cannot find it.
Apple Mail (iPhone, iPad and Mac)
Apple offers two layers of protection:
- Mail Privacy Protection: On iPhone or iPad, go to Settings > Apps > Mail > Privacy Protection (older versions: Settings > Mail > Privacy Protection) and switch on Protect Mail Activity. This hides your IP address and loads remote content privately in the background, so senders cannot reliably tell if or when you opened a message.
- Block all remote content: On the same screen, turn on Block All Remote Content (older versions: turn off Load Remote Images under Mail settings). On Mac, open Mail, go to Settings > Privacy, and enable Protect Mail Activity and Block All Remote Content.
Mail Privacy Protection is one of the most effective built-in defenses, because it makes open data unreliable for senders.
Yahoo Mail
Open Settings > More Settings > Viewing email and look for the option controlling images. Choose to Ask before showing images or the closest equivalent. Yahoo also offers a setting to hide images from unknown senders.
Mozilla Thunderbird
Thunderbird blocks remote content by default. Confirm this under Settings > Privacy & Security > Mail Content and make sure Allow remote content in messages is switched off. When a message needs it, you can allow it for that single email only.
Proton Mail
Go to Settings > All settings > Email > Message and composing and set Auto-load remote content to off, along with embedded images if you prefer. Proton also detects and reports known trackers in messages and blocks many of them by default.
Beyond Images: Other Ways to Reduce Tracking
Switch to plain text
Plain-text emails cannot contain tracking pixels or scripts. Many clients let you view messages as plain text by default. You lose formatting, but gain privacy. This is especially useful for emails from unknown senders.
Disable read receipts
In Outlook and some other clients, you can choose to never send read receipts. In Outlook, look under File > Options > Mail > Tracking and select Never send a read receipt. Apple Mail and Gmail only send receipts when you approve each request.
Clean tracked links
Before clicking a link in a marketing email, hover over it to preview the destination. If the URL is long and full of random characters, it is probably tracked. You can:
- Search for the company’s website yourself instead of clicking.
- Use a browser extension that strips tracking parameters from URLs.
- Use a browser with built-in protection against tracking parameters in links.
Use email aliases
If each service gets a unique address, you can see who leaks or sells your information, and you can delete any alias that attracts tracking or spam. Alias services also mask your real address from senders (see tools below).
Unsubscribe the right way
Unsubscribe from newsletters you recognize, through the official link. Be careful with unknown or suspicious senders: replying or clicking “unsubscribe” can confirm that your address is active. Mark those messages as spam instead.
Use a VPN or private relay
A VPN hides your real IP address, which prevents location tracking even if a pixel loads. This does not stop open tracking itself, so combine it with image blocking.
Keep software updated
Mail apps regularly add new anti-tracking protections. Updating your client, operating system and browser keeps you covered by the latest ones.
Email Tracking Control Tools: Detailed Reviews
If you want something stronger than built-in settings, these tools block, strip or neutralize trackers. Features and pricing change, so check each provider’s website for current details.
1. Apple Mail Privacy Protection
Best for: Apple users who want protection with zero setup effort.
How it works: Pre-loads remote content through proxy servers and masks your IP address, so open tracking data becomes inaccurate.
Pros: Built in, free, automatic, works across Apple devices.
Cons: Only available in Apple Mail. It does not remove tracked links.
2. Proton Mail
Best for: Users who want a privacy-first email provider.
How it works: Proton proxies images and blocks known trackers by default, shows a tracker report in the message view, and strips tracking parameters from many links. It also offers end-to-end encryption between Proton users.
Pros: Strong privacy by design, clear tracker notices, free plan available.
Cons: Requires moving to a new email address or forwarding your existing mail.
3. HEY Email
Best for: People who want a clean, opinionated inbox with tracking blocked automatically.
How it works: HEY blocks spy pixels in incoming messages and flags emails that tried to track you, so you can see which senders are doing it.
Pros: Automatic blocking, visible tracker alerts, good screening tools for unknown senders.
Cons: Paid subscription, and a different workflow from traditional email apps.
4. DuckDuckGo Email Protection
Best for: Keeping your current email provider while removing trackers.
How it works: You get a free @duck.com address that forwards to your real inbox. Trackers in incoming mail are stripped before the message reaches you, and you can create disposable addresses.
Pros: Free, works with any provider, easy to set up.
Cons: Only protects messages sent to your Duck address, so you must use it for sign-ups.
5. Firefox Relay
Best for: Hiding your real email address while reducing tracking.
How it works: Relay creates masked email addresses that forward to your inbox. It can remove trackers from forwarded emails, and you can switch off any mask at any time.
Pros: Easy masks, browser integration, free tier.
Cons: Free plan limits the number of masks, and some features need a paid plan.
6. Apple Hide My Email and SimpleLogin
Best for: Users who want unlimited or manageable aliases.
How it works: Hide My Email (with iCloud+) generates random addresses that forward to you. SimpleLogin, part of the Proton family, offers aliases for any provider and can be self-hosted.
Pros: Great for spotting leaks and ending spam at the source.
Cons: Aliases reduce exposure to tracking but do not remove pixels from messages unless combined with image blocking.
7. Mozilla Thunderbird
Best for: Desktop users who prefer a free, open-source client for any provider.
How it works: Blocks remote content by default and lets you allow it per message or per sender.
Pros: Free, open source, highly configurable, works with Gmail, Outlook and others.
Cons: Desktop focused, and the interface has a learning curve.
8. Browser extensions for webmail
Best for: Gmail or Outlook web users who want an extra layer.
Some extensions detect and label tracking pixels in webmail, and others strip tracking parameters from links (for example, ClearURLs). Because extensions come and go, and some older anti-pixel add-ons have been discontinued, check that any extension is actively maintained, has good reviews and requests minimal permissions before installing.
Pros: Easy to try, visible indicators.
Cons: Dependent on the developer’s upkeep, and they work only in the browser.
9. Tuta (formerly Tutanota)
Best for: People who want an encrypted, privacy-first inbox.
How it works: Tuta is an end-to-end encrypted email service that blocks remote content and tracking pixels by default, so senders do not learn when you open a message.
Pros: Open-source apps, encrypted mailbox and calendar, tracking protection without setup.
Cons: A new address is needed, and it does not support standard IMAP access to other apps.
10. Fastmail
Best for: Users who want a polished paid inbox with fine control over images.
How it works: Fastmail lets you decide whether remote images load always, never or only for trusted senders, and its Masked Email feature creates throwaway addresses for sign-ups.
Pros: Excellent speed, custom domains, no advertising model, built-in masked addresses.
Cons: Paid only, and you must check your image setting rather than assume it is strict.
11. FairEmail (Android)
Best for: Android users who want maximum control.
How it works: This open-source client can hold back remote images, flag suspected tracking images, and show the real destination of a link before you open it.
Pros: Very detailed privacy options, works with most providers, no ads.
Cons: The settings are extensive and can overwhelm beginners, and some features require a paid upgrade.
12. Thunderbird for Android (formerly K-9 Mail)
Best for: Android users who want a simple, free and open-source client.
How it works: Remote images stay hidden until you tap to show them, which keeps pixels from firing automatically.
Pros: Free, open source, supports multiple accounts.
Cons: Fewer tracker-specific features than FairEmail, and no link cleaning.
13. Mailbird (Windows)
Best for: Windows users who want a unified inbox for several accounts.
How it works: Mailbird includes settings that control whether images in incoming messages load automatically, so you can switch loading off and approve trusted senders.
Pros: Clean interface, combines many accounts, easy image control.
Cons: Windows focused, some features are paid, and its protection is mainly image blocking rather than full tracker removal.
14. NeoMutt (terminal)
Best for: Technical users comfortable with the command line.
How it works: NeoMutt is a text-based mail client that does not load remote images on its own, so image pixels never get the chance to fire. You can open HTML in a separate viewer only when you choose to.
Pros: Free, lightweight, extremely customizable, privacy-friendly by design.
Cons: Steep learning curve and a manual setup for each account.
15. Brave Browser
Best for: Webmail users who want link protection built into the browser.
How it works: Brave’s Shields block known trackers and strip many tracking parameters from URLs, so clicking a tracked link in your webmail leaks less information.
Pros: Built in, free, works on desktop and mobile.
Cons: It protects the browser session only, not your email app, and it cannot stop a pixel that your mail provider loads on its own servers.
16. Firefox with Enhanced Tracking Protection
Best for: Users who want strong, configurable protection in a mainstream browser.
How it works: In Strict mode and in Private Windows, Firefox removes known tracking parameters from links and blocks many third-party trackers.
Pros: Free, open source, large add-on ecosystem.
Cons: Strict mode can occasionally break a website, and protection applies only inside Firefox.
17. Vivaldi
Best for: Power users who like a customizable browser with a tracker blocker.
How it works: Vivaldi includes a built-in tracker and ad blocker with adjustable levels, which limits trackers on pages you reach from email links. It also bundles a mail client with its own settings.
Pros: No extensions needed, flexible blocking levels.
Cons: Stricter levels can interfere with some sites, and the built-in mail client is less proven than dedicated ones.
18. Safari Link Tracking Protection (iPhone, iPad, Mac)
Best for: Apple users who want links cleaned automatically.
How it works: In recent Apple software, Safari Private Browsing, Mail and Messages remove tracking parameters from links that carry them. Combined with Mail Privacy Protection, this covers both opens and clicks.
Pros: Automatic, free, nothing to install.
Cons: Works only for known tracking parameters, and only on up-to-date Apple devices.
19. ClearURLs
Best for: Anyone who clicks links from newsletters and wants clean URLs.
How it works: This open-source extension removes tracking elements such as UTM tags and other identifier parameters from links before the page loads.
Pros: Lightweight, free, works with many browsers, rules are updated regularly.
Cons: It cannot remove tracking that happens on the sender’s redirect server before your browser sees the final address.
20. Privacy Badger
Best for: Users who want an extension that learns trackers by their behavior.
How it works: Made by the Electronic Frontier Foundation, Privacy Badger watches which third-party domains follow you across sites and blocks them automatically.
Pros: No lists to manage, nonprofit developer, free.
Cons: Webmail providers often load images through their own proxies, so its effect on email pixels can be limited.
21. uBlock Origin
Best for: Advanced users who want precise control over what loads in the browser.
How it works: This content blocker stops requests to known tracking domains and supports custom filter rules, so you can block a specific pixel host you have spotted in a message.
Pros: Free, open source, efficient, highly customizable.
Cons: Needs some technical knowledge, and its coverage of webmail images depends on how the provider serves them.
22. Ghostery
Best for: Beginners who want a simple tracker blocker with clear reports.
How it works: Ghostery detects and blocks trackers on web pages and shows what it found, which helps you understand who is watching when you click through from an email.
Pros: Easy interface, free tier, visual reports.
Cons: Like other extensions, it works in the browser only and has limited effect on pixels loaded by your mail provider.
23. addy.io (formerly AnonAddy)
Best for: Users who want open-source email aliases for any provider.
How it works: addy.io creates alias addresses that forward to your real inbox. You can switch off any alias that attracts tracking or spam, and the free plan covers basic use.
Pros: Open source, can be self-hosted, works with any email provider.
Cons: Aliases hide your address but do not stop pixels in messages that reach you.
24. Mullvad VPN
Best for: Users who want to hide their IP address with a privacy-focused provider.
How it works: A VPN replaces your IP address with the server’s, so a tracking pixel that loads reveals the VPN location rather than yours. Mullvad is known for its no-account-details sign-up and no-logs approach.
Pros: Strong privacy reputation, simple pricing, open-source apps.
Cons: Paid only, and it does not stop open tracking by itself.
25. Proton VPN
Best for: Users who want a VPN with a free tier from a trusted privacy brand.
How it works: Proton VPN hides your IP address and encrypts your connection, which prevents location tracking through email pixels. It pairs naturally with Proton Mail.
Pros: Free plan available, audited apps, easy to use.
Cons: The free tier has fewer servers and lower speeds, and open tracking still requires image blocking.
26. NextDNS
Best for: Users who want network-level blocking across every device.
How it works: NextDNS is a cloud DNS service that blocks requests to known tracking and advertising domains using selectable blocklists, so a pixel hosted on a listed domain fails to load in any app on that device or network.
Pros: Works on phones, computers and routers, easy dashboard, a free tier is available.
Cons: It only blocks domains on its lists, and heavy use may need a paid plan.
27. Pi-hole
Best for: Home users who enjoy running their own network filter.
How it works: Pi-hole is free software that runs on a small computer in your home and acts as a DNS sinkhole, blocking tracking domains for every device on your network.
Pros: Free, open source, covers the whole household, detailed query logs.
Cons: Requires setup and maintenance, and it does not protect you away from home unless you add a VPN.
28. Email Privacy Tester
Best for: Checking how well your current email app protects you.
How it works: Email Privacy Tester is a free website that sends a test message to your address and reports which tracking techniques your email client allowed. Check the site for current instructions before using it.
Pros: Free, shows real results for your own setup, helps you compare apps.
Cons: It is a diagnostic only, so you still have to change your settings yourself.
Quick comparison
| Tool | Type | Blocks open tracking | Cleans links | Cost |
|---|---|---|---|---|
| Apple Mail Privacy Protection | Built-in feature | Yes | No | Free |
| Proton Mail | Email provider | Yes | Often | Free and paid |
| HEY Email | Email provider | Yes | Partly | Paid |
| DuckDuckGo Email Protection | Forwarding service | Yes | Yes | Free |
| Firefox Relay | Masking service | Yes | Varies | Free and paid |
| Apple Hide My Email / SimpleLogin | Alias service | No (hides your address) | No | Paid (iCloud+) / Free and paid |
| Thunderbird | Email client | Yes (remote content block) | No | Free |
| Browser extensions (general) | Add-on | Varies | Some | Mostly free |
| Tuta | Email provider | Yes (by default) | No | Free and paid |
| Fastmail | Email provider | Yes (when set to block) | No | Paid |
| FairEmail (Android) | Email client | Yes | Partly (shows real link) | Free and paid |
| Thunderbird for Android | Email client | Yes (images hidden until shown) | No | Free |
| Mailbird | Email client | Yes (when set to block) | No | Free and paid |
| NeoMutt | Terminal email client | Yes (no remote images) | No | Free |
| Brave Browser | Browser | No (link protection only) | Yes | Free |
| Firefox with Enhanced Tracking Protection | Browser | No (link protection only) | Yes (Strict and Private mode) | Free |
| Vivaldi | Browser | No (blocks trackers on web pages) | Partly | Free |
| Safari Link Tracking Protection | Browser and Apple apps | No (link protection only) | Yes | Free |
| ClearURLs | Browser extension | No | Yes | Free |
| Privacy Badger | Browser extension | Limited | No | Free |
| uBlock Origin | Browser extension | Limited | No | Free |
| Ghostery | Browser extension | Limited | No | Free and paid |
| addy.io | Alias service | No (hides your address) | No | Free and paid |
| Mullvad VPN | VPN | No (hides your IP) | No | Paid |
| Proton VPN | VPN | No (hides your IP) | No | Free and paid |
| NextDNS | DNS filter | Partly (blocks listed tracker domains) | No | Free and paid |
| Pi-hole | Home network DNS filter | Partly (blocks listed tracker domains) | No | Free |
| Email Privacy Tester | Testing website | No (diagnostic only) | No | Free |
How to Check Whether an Email Is Tracking You
- Look for tracker warnings. Providers like Proton and HEY tell you when trackers were blocked.
- View the source. Open the message’s raw or original source and search for “img” tags with tiny dimensions such as width=“1” height=“1”, or images hosted on unfamiliar domains.
- Inspect links. Hover over links to see whether they route through a third-party domain.
- Notice personalization. Greetings by name, “view in browser” links and unique unsubscribe URLs signal that every copy is individually identifiable.
What Email Tracking Blockers Cannot Do
Be realistic about the limits:
- Blocking images stops open tracking, but click tracking still happens if you click a tracked link.
- Some senders will treat your blocked images as proof you are unusually privacy conscious, but that does not harm you.
- Replying to or forwarding a message may share information with the sender.
- If you use a tracking-blocking service that loads images on your behalf, the sender may register a false open, which is harmless but not a sign of your activity.
Best Practice Setup: A Simple Privacy Routine
- Turn off automatic remote image loading in your main email app.
- Enable Mail Privacy Protection if you use Apple Mail.
- Use aliases or a masked address for newsletters, shopping and sign-ups.
- Hover over links before clicking and avoid clicking links in unknown emails.
- Disable read receipts.
- Consider a privacy-focused provider or client if tracking concerns you daily.
- Review and unsubscribe from lists you no longer read, once a quarter.
Is Email Tracking Legal?
The answer depends on where you live. In many regions, laws such as the EU’s GDPR and ePrivacy rules and the UK’s equivalent treat tracking pixels as processing of personal data, which generally requires transparency and, in many cases, consent. Other regions have lighter rules. This article is general information, not legal advice, so consult a qualified professional or your local data protection authority if you need guidance on your rights.
Frequently Asked Questions (FAQs)
1. Can I completely stop email tracking?
You can stop most of it. Blocking remote images prevents open tracking, and avoiding or cleaning links limits click tracking. Combined with aliases and a privacy-focused client, you can reduce tracking to a very low level, though no single setting removes every possible method.
2. How can I tell if an email has a tracking pixel?
Look for tracker warnings in providers that offer them, inspect the message source for tiny images from third-party domains, or notice if images only appear after you choose to load them.
3. Does Gmail protect me from email tracking?
Partially. Gmail proxies images to hide your IP address, but the sender can still often detect that the message was opened. Setting Gmail to ask before displaying external images gives better protection.
4. Does turning off images stop all tracking?
It stops pixel-based open tracking, which is the most common kind. It does not stop link click tracking or tracking caused by you replying or forwarding.
5. Does Apple Mail Privacy Protection really work?
Yes, it hides your IP and downloads content in advance, which makes open data unreliable for senders. It does not remove tracked links, so pair it with careful clicking.
6. Is it safe to unsubscribe from emails?
It is safe for reputable companies and newsletters you signed up for. For unknown or suspicious senders, mark as spam rather than clicking links.
7. Can senders see my location through email?
Often they can see an approximate location from your IP address when a tracking pixel loads. Image blocking, a VPN or proxy-based protections prevent this.
8. What is the best tool to stop email tracking?
It depends on your setup. Apple users benefit from Mail Privacy Protection, privacy-focused users often prefer Proton Mail or HEY, and those who want to keep their existing provider can use DuckDuckGo Email Protection or Firefox Relay.
9. Do read receipts count as email tracking?
Yes, they are a visible form of it. They only work if your app agrees to send them, so set yours to never send, or to ask each time.
10. Is email tracking illegal?
Not everywhere. Rules vary by country, and in some regions consent and disclosure are required. Check your local data protection law for specifics.
11. Will blocking trackers break my emails?
Some emails may look plain or incomplete until you choose to load images. You can usually allow images for a trusted sender in one tap.
12. Do tracking blockers work on mobile?
Yes. Most mobile mail apps have a setting to ask before loading images, and Apple Mail’s protection is built in on iPhone and iPad.
Final Thoughts
Email tracking works quietly in the background, but stopping it does not require technical skills. Start with the simplest, highest-impact step: stop your email app from automatically loading remote images. Then add layers that fit your life, such as aliases, a privacy-first provider and careful link habits. A few minutes of setup gives you back control over what senders can learn about you every time a message lands in your inbox.
