1:"$Sreact.fragment"
8:I[96237,["/_next/static/chunks/12b9~mg3o6lnh.js","/_next/static/chunks/0xs8ni7jz0o1p.js"],"OutletBoundary"]
9:"$Sreact.suspense"
2:Ta97,{"@context":"https://schema.org","@graph":[{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://mailshade.org/"},{"@type":"ListItem","position":2,"name":"Guides","item":"https://mailshade.org/guide/"},{"@type":"ListItem","position":3,"name":"How to tell if an email is being tracked","item":"https://mailshade.org/guide/how-to-tell-if-an-email-is-tracked/"}]},{"@type":"Article","headline":"How to tell if an email is being tracked","description":"An email can carry a 1x1 pixel that fires on open. Learn how Mailshade detects pixel/link signals and network-blocks known tracker domains.","inLanguage":"en","image":"https://mailshade.org/og/guide/how-to-tell-if-an-email-is-tracked.png","mainEntityOfPage":"https://mailshade.org/guide/how-to-tell-if-an-email-is-tracked/","author":{"@type":"Organization","name":"Mailshade","url":"https://mailshade.org"},"publisher":{"@type":"Organization","name":"Mailshade","url":"https://mailshade.org"}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Can I tell an email is tracked just by reading it?","acceptedAnswer":{"@type":"Answer","text":"No. The tracking pixel is a 1x1 transparent image, invisible in the message body. You need a tool that detects known tracker domains, such as Mailshade's red-eye overlay, to know for certain."}},{"@type":"Question","name":"Does the red-eye overlay work outside Gmail?","acceptedAnswer":{"@type":"Answer","text":"Yes. Mailshade flags tracked messages across Gmail, Outlook, Office 365, Superhuman, Yahoo Mail and ProtonMail, naming the tracker domain it detected on each."}},{"@type":"Question","name":"Does detecting a tracker also block it?","acceptedAnswer":{"@type":"Answer","text":"Mailshade network-blocks requests to known tracker-pixel domains via declarativeNetRequest. Its DOM scan can also detect heuristic pixels and tracking links, so a dashboard detection is not by itself proof that every associated request was blocked."}},{"@type":"Question","name":"Will checking for trackers send my email anywhere?","acceptedAnswer":{"@type":"Answer","text":"Detection runs locally, and core inbox history is not sent to Mailshade servers. Tracker events stay in IndexedDB with URLs reduced to origins; settings can use Chrome Sync. Paid auth/Polar calls and optional off-by-default privacy-filtered Hawk crash reports are separate."}},{"@type":"Question","name":"Is Mailshade free to check my email for trackers?","acceptedAnswer":{"@type":"Answer","text":"Yes. Core blocking, inbox detection, link warnings, rolling seven-day history and a top-10 sender view remain free after a 14-day Pro trial. Paid Pro adds full history, top 30 and CSV export."}}]}]}0:{"rsc":["$","$1","c",{"children":[["$","main",null,{"className":"container-x py-16","children":[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$2"}}],["$","article",null,{"className":"prose prose-ink max-w-none","children":[["$","h1",null,{"children":"How to tell if an email is being tracked"}],["$","p",null,{"className":"text-lg text-ink-200","children":"An email is tracked when it carries a 1x1 pixel image whose load reports back to the sender the moment you open the message — your IP, device and the open time. The hard part is that the pixel is invisible, so you cannot tell by reading the message. Mailshade's DOM scan detects suspicious pixels and known tracking-link patterns in opened messages, while declarativeNetRequest independently blocks requests to known tracker-pixel domains. A red-eye overlay names what was detected across Gmail, Outlook, Office 365, Superhuman, Yahoo Mail and ProtonMail. Keeping detection and blocking distinct makes the result honest: the dashboard records detections, while DNR provides the known-domain network block."}],"$L3","$L4","$L5"]}]]}],null,"$L6"]}],"isPartial":false,"staleTime":300,"varyParams":null,"buildId":"mailshade-static-v1"}
7:T4b4,<h2>Signs an email is tracked</h2><ul><li>It comes from a marketing, sales, recruiting or newsletter sender.</li><li>It contains remote images that load from a domain you do not recognise.</li><li>A tracker-detection tool flags a pixel or known tracking-link pattern on the message.</li></ul><h2>How to check a specific message</h2><ol><li>Install Mailshade, opt into your mail client, and open the email.</li><li>Look for the red-eye overlay on an opened message with a detected tracker.</li><li>Read the tracker domain it reports to confirm what was found.</li><li>Open the dashboard to see that sender's detection history.</li></ol><h2>From knowing to blocking</h2><p>Detection alone does not protect you. Mailshade separately uses DNR to cancel requests to known tracker-pixel domains. A heuristic pixel or link detection is useful evidence, but is not itself a claim that every associated request was network-blocked.</p><h2>Why some emails show nothing</h2><p>Plain personal email and most transactional receipts carry no tracker, so they show no overlay. An absence of the red eye means the local scan found no matching signal; it is not an absolute guarantee that no unknown technique exists.</p>3:["$","div",null,{"dangerouslySetInnerHTML":{"__html":"$7"}}]
4:["$","section",null,{"className":"mt-12","children":[["$","h2",null,{"children":"FAQ"}],[["$","details","0",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Can I tell an email is tracked just by reading it?"}],["$","p",null,{"className":"mt-2","children":"No. The tracking pixel is a 1x1 transparent image, invisible in the message body. You need a tool that detects known tracker domains, such as Mailshade's red-eye overlay, to know for certain."}]]}],["$","details","1",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Does the red-eye overlay work outside Gmail?"}],["$","p",null,{"className":"mt-2","children":"Yes. Mailshade flags tracked messages across Gmail, Outlook, Office 365, Superhuman, Yahoo Mail and ProtonMail, naming the tracker domain it detected on each."}]]}],["$","details","2",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Does detecting a tracker also block it?"}],["$","p",null,{"className":"mt-2","children":"Mailshade network-blocks requests to known tracker-pixel domains via declarativeNetRequest. Its DOM scan can also detect heuristic pixels and tracking links, so a dashboard detection is not by itself proof that every associated request was blocked."}]]}],["$","details","3",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Will checking for trackers send my email anywhere?"}],["$","p",null,{"className":"mt-2","children":"Detection runs locally, and core inbox history is not sent to Mailshade servers. Tracker events stay in IndexedDB with URLs reduced to origins; settings can use Chrome Sync. Paid auth/Polar calls and optional off-by-default privacy-filtered Hawk crash reports are separate."}]]}],["$","details","4",{"className":"my-3","children":[["$","summary",null,{"className":"font-medium","children":"Is Mailshade free to check my email for trackers?"}],["$","p",null,{"className":"mt-2","children":"Yes. Core blocking, inbox detection, link warnings, rolling seven-day history and a top-10 sender view remain free after a 14-day Pro trial. Paid Pro adds full history, top 30 and CSV export."}]]}]]]}]
5:["$","nav",null,{"aria-label":"Related pages","className":"mt-12","children":[["$","h2",null,{"children":"Related"}],["$","ul",null,{"children":[["$","li","/guide/how-to-block-email-tracking/",{"children":["$","a",null,{"href":"/guide/how-to-block-email-tracking/","children":"How to block email tracking"}]}],["$","li","/guide/how-email-tracking-works/",{"children":["$","a",null,{"href":"/guide/how-email-tracking-works/","children":"How email tracking works"}]}],["$","li","/compare/mailshade-vs-ugly-email/",{"children":["$","a",null,{"href":"/compare/mailshade-vs-ugly-email/","children":"Mailshade vs Ugly Email"}]}]]}]]}]
6:["$","$L8",null,{"children":["$","$9",null,{"name":"Next.MetadataOutlet","children":"$@a"}]}]
a:null
