See mailshade.org

How to stop sales emails tracking you

A sales or recruiting email can contain a unique remote image whose fetch creates a signal, and it can use an intermediary link to record or correlate a click. The metadata available to an endpoint depends on the client or proxy path. Mailshade uses declarativeNetRequest to cancel receiver-side browser requests matching reviewed tracker-pixel endpoints. Its local DOM scan detects supported tracking-link patterns and, when a direct destination can be verified from the URL, offers that destination or the original URL. Recognized opaque redirects remain warnings without a guessed destination. Mailshade works across opted-in Gmail, Outlook, Office 365, Superhuman, Yahoo Mail and ProtonMail, and keeps a local detection history by sender.

What a tracking request can expose

A unique pixel request can create an open signal, while contacting an intermediary redirect can create a click signal. The endpoint may observe request timing and network or client metadata, depending on the delivery path.

Handling supported signals

  1. Install Mailshade and opt into your mail client.
  2. Open a controlled sales or recruiting message — receiver-side browser requests matching reviewed tracker-pixel endpoints are cancelled via DNR.
  3. For a supported tracking link, review the direct destination when one can be verified and the original choice; an opaque route remains clearly labelled.
  4. Review the dashboard to see which senders produced detections.

What cancellation proves

A cancelled matching request does not reach the reviewed endpoint from the tested page. It does not establish every upstream or sender-side outcome; in Gmail, Google may have fetched or cached an image earlier.

You stay reachable

Tracker-request filtering does not block message delivery. Non-matching message content can continue to load, and the original link remains available when you want it.

FAQ

Do sales emails really track when I open them?

Sales engagement and recruiting tools can embed tracking pixels and rewrite links to create open or click signals. Mailshade cancels browser requests matching reviewed tracker-pixel endpoints and warns on supported redirect patterns, offering a verified direct destination when one is available.

Will the sender know I blocked their tracking?

Mailshade does not send a separate block notification. A cancelled matching browser request does not reach the reviewed endpoint from the tested page, but this does not establish every provider-side event; in Gmail, Google may have fetched or cached the image earlier.

Does blocking stop me receiving the emails?

Mailshade does not block message delivery. It cancels browser requests matching reviewed tracker-pixel endpoints and warns on supported tracking links; non-matching content can continue to load.

Does this work in Outlook and Superhuman, where sales reps often send?

Yes. After opt-in, Mailshade applies the same reviewed endpoint catalog across Gmail, Outlook, Office 365, Superhuman, Yahoo Mail and ProtonMail. This is receiver-side browser protection; Gmail may have fetched or cached an image server-side before Chrome evaluates a supported proxy request.

How much does Mailshade cost?

Core protection remains free after a 14-day Pro trial. Paid Pro starts at $3.99 per month or $19 one-time for Founders Lifetime, capped at the first 1000 seats.