When you send a document as an email attachment, you have no way to know whether it was opened. The only way to track a document after sending it is to share it as a tracked link rather than a file. A tracked link stays connected to a server that logs every open, time spent per page, and whether the document was forwarded to someone else.
You sent the proposal. Or the deck. Or the contract. You hit send, and now you are waiting, with no idea whether the other person has even looked at it.
This is one of the most common frustrations in sales, fundraising, and business development. And for most senders, it is entirely avoidable. The problem is rarely the document itself. It is how the document was delivered.
Why email attachments give you nothing to track
When you send a file as an email attachment, the file gets copied to the recipient's device. At that point it is a local file on their machine, disconnected from you entirely. Your email client might tell you the email was delivered, and some services will tell you it was opened, but neither tells you anything about the attachment.
The email open event fires when the recipient opens the email, not when they open the attachment. A recipient can open your email, ignore the attachment, and your tracking pixel will still register a successful open. On the other hand, someone could open the PDF days later without ever reopening the email, and you would see nothing.
This is the structural problem with attachment-based sharing. Why you should stop sending documents as attachments explains what this costs you in practice and what the alternative looks like.
Can you track when someone opens an email attachment?
No, not through Gmail or Outlook natively. Neither platform provides attachment open tracking. An email open pixel only detects when the email itself is loaded in the browser or mail client, which is a different event from the recipient opening the attached file.
Some third-party tools claim attachment tracking by embedding a tracking element inside the file itself. In practice, this is unreliable. PDF readers vary in how they handle embedded content, and many corporate email environments strip or block the tracking mechanisms before the file even reaches the recipient.
The more reliable answer is to change the delivery method rather than the file. A document shared as a hosted tracked link is not a file at all; it is a request to a server you control, which logs every interaction accurately and consistently. How to track if someone opened your PDF covers the technical breakdown of why this works where attachments cannot.
How does document tracking actually work?
When you upload a document to a platform like Pitchwise and share it as a tracked link, the document is hosted on a server. Every time the recipient opens the link, the server registers the event. It logs the timestamp, the viewer's IP address, their device type, how long they spent on each page, and whether they returned for a second session.
If the recipient forwards the link to someone else, the new viewer shows up in your analytics as a separate session. You did not send that person the link directly, but you can see they have the document and how they engaged with it.
Pitchwise also supports per-recipient links, so you can generate a unique URL for each person you send it to. This tells you not just that the document was opened but also which specific recipient opened it and what they did. That level of granularity is what changes how you follow up.
What does document tracking data actually show you?
The most useful data points from a tracked document are the first open timestamp (so you know when to follow up), time spent per page (so you know which sections held attention and which were skipped), total number of sessions (so you can see if they came back), and new viewers (so you can see if the document is circulating).
For proposals and pitch decks, the page-level data is particularly valuable. If a recipient spends four minutes on your pricing slide and thirty seconds on everything else, that is a signal about where their concern is focused. If they spend no time on the solution section and immediately jump to pricing, that tells you something different about their mindset going in.
For high-stakes documents that need more than email, this kind of detail is the difference between a follow-up that lands and one that misses entirely.
How do you send a document by email with tracking enabled?
The process is straightforward. Upload your document to Pitchwise, which generates a shareable link. Copy that link into your email instead of attaching the file. The recipient clicks the link and reads the document in their browser, exactly as if you had attached it, but from your side you now have live visibility into what happens.
You can customise the link before sending: set an expiry date, require email verification before viewing, disable downloads, or enable dynamic watermarking. For a first send to a warm prospect, you will rarely need all of these. For a sensitive document going to someone you do not know well, the controls give you options you simply do not have with an attachment.
Once the link is sent, Pitchwise notifies you in real time the moment the document is opened. You do not need to check a dashboard repeatedly; the notification comes to you. From that point, the engagement data accumulates, and you can follow up at exactly the right moment.
Frequently Asked Questions
Can you track when someone opens an email attachment?
Not reliably through Gmail or Outlook. Email open tracking detects when the email is opened, not when an attachment is opened. To track document opens accurately, share the document as a tracked link rather than a file attachment, the link logs every open event and page-level engagement.
Does Gmail tell you when someone opens a PDF you sent?
No. Gmail's read receipts and email tracking tools only detect email opens, not PDF opens. Once a PDF is downloaded to someone's device, it becomes a local file with no connection back to you. Sharing via a tracked link solves this completely.
How do you know if someone has actually read a document you sent?
Only if you sent it as a tracked link. A tracked link shows you the exact timestamp they opened it, how long they spent on each page, whether they returned, and whether the link was forwarded to anyone else. Email attachments provide none of this.
What is the difference between email tracking and document tracking?
Email tracking detects whether an email was opened. Document tracking detects whether the content of a document was read, for how long, and at what depth. Email tracking fires on email open; document tracking fires on every page scroll and session, giving you much richer data about actual engagement.
