How to see if someone read your email? 4 ways for free

You just sent out 50 personalized emails, excited about the responses you’ll get. A day passes. Crickets. Was your email even opened, or are your prospects simply not interested? I’ve sat in that exact silence more times than I want to admit, refreshing an inbox like it owed me money. The worst part isn’t the lack of replies. It’s not knowing which part of the campaign broke.

In this article, I’ll show you four ways to see if someone read your email, so you can track your progress, follow up more effectively, and boost your reply chances. I’ll also add a bonus method that needs no tool at all, and cover what EU regulators now expect from you before you drop a tracking pixel into a message.

4 ways to see if someone read your email

1. Request a read receipt

A read receipt is a notification confirming that your prospect received and opened your email.

Read receipts can appear as a pop-up notification when the recipient opens the email, requesting them to give immediate feedback.

This method is the most privacy-friendly of the bunch, because your recipient sees straight off the bat that you’re tracking that information. The tradeoff: they can decline, and plenty do.

Here’s how to activate it in different email providers:

How to add a read receipt on Gmail?

1. 1.

   On your computer, open Gmail

2. 2.

   Click “Compose”

3. 3.

   Write your email as you normally would

4. 4.

   At the bottom right, click “More options”, then “Request read receipt”

5. 5.

   Click “Send”

P.S. Google’s own Gmail Help documentation is clear on the limits here: read receipts only work on a Google Workspace account for work or school, never on a personal @gmail.com address. Your admin has to allow the feature, and the recipient may need to approve the receipt before it reaches your inbox.

How to add a read receipt on Outlook?

1. 1.

   Log into your Outlook account

2. 2.

   Compose a new message

3. 3.

   Go to the “Options” tab on the ribbon (if you don’t see the tracking boxes, click “More options” at the right end of the ribbon)

4. 4.

   Tick “Request a Read Receipt”

In classic Outlook, you can also switch receipts on for everything you send through File > Options > Mail > Tracking. Microsoft’s support page notes the feature isn’t available for IMAP or POP accounts such as Gmail, Yahoo or iCloud, so check which account you’re actually sending from before you go hunting for the button.

Read receipts are a common way to check if your recipient has read your email or not. Here are the things we like and dislike about using them ⬇️

2. Use an email tracking Chrome extension

You can use a Chrome extension to track your email open rates.

You install these extensions directly into your web browser. The extension then automatically includes a tracking pixel within the body of the email.

Once the email has been opened, you receive a notification where you can also check out when exactly it was opened. That keeps good track of who could use a follow-up and when.

Check out some of our favorites ⬇️

MailTrack

1. 1.

   Install the Mailtrack read receipts extension

2. 2.

   Send emails normally: Mailtrack will track all your emails automatically

3. 3.

   Open your “Sent emails” folder to see the read receipt status

• •

  One checkmark means your email has been sent but not opened

• •

  Two checkmarks mean that your email has been opened

4. 4.

   Hover the mouse over the checkmarks to know exactly when and how many times your email has been opened

Free Email Tracker by cloudHQ

1. 1.

   Install the cloudHQ Chrome extension from the Chrome Web Store

2. 2.

   Open your Gmail account and compose a new email

3. 3.

   Click on the “Track” checkbox at the bottom of the email compose window

4. 4.

   The Free Email Tracker will automatically track when your email is opened and provide real-time notifications

5. 5.

   To view the tracking details, open your Sent folder and click the “cloudHQ” button next to the email you want to track

Email Tracker by Mailtag

1. 1.

   Install the Email Tracker – Mailtag Chrome extension from the Chrome Web Store

2. 2.

   Open your Gmail account and compose a new email

3. 3.

   Click on the MailTag icon in the compose window’s bottom-right corner

4. 4.

   Click on the “Track” checkbox to enable tracking for your email

5. 5.

   The Email Tracker 2.0 will automatically track your email’s opening and send real-time notifications

6. 6.

   To view the tracking details, go to your Sent folder and click the MailTag icon next to the email you want to track

Chrome extensions are easy to use and require little to no setup. They still have their downsides.

3. Use email automation software

The best way to track your campaign performance is by using email automation software, such as lemlist.

If you’re serious about your cold email outreach, you need reporting that covers the whole sequence, not one message at a time. That’s where a sales engagement platform earns its place. lemlist is rated 4.6/5 on G2 from 2,000+ reviews, which tells you a fair number of sales teams reached the same conclusion.

It lets you send, manage and track all your campaigns from the same spot, which saves you hours of manual work and makes your outreach easier to steer.

In a single interface, lemlist users can see:

• •

  How many leads received their emails, how many opened, clicked, replied, and how many are interested

• •

  Data for LinkedIn steps: how many invites (or connection requests) were sent, how many LinkedIn profiles they visited, and how many messages were sent

• •

  If API steps are included in a campaign, they will also appear in the results

• •

  The same engagement history synced into HubSpot or Salesforce, so your CRM record shows who opened what without anyone copy-pasting it in

You can also switch to the negative metrics of your campaigns to access the number of emails that bounced, the number of leads that are not interested, and how many of them unsubscribed.

Monitoring & Alerts flags deliverability issues early, so you can take steps to ensure your emails always land in your prospects’ inboxes.

Tracking these metrics is how you’ll see whether your campaigns are working. Your metrics also tell you what to change to improve your results. lemlist tracks email opens and gives you the tools to analyze performance and optimize every step of your outreach.

You can test it out for free and always know your campaign status, so you approach your prospects in the best way and boost your replies.

4. Use an HTML image tag

A useful method for all coding pros out there is using an image tag in an HTML email.

Image tags in HTML can work as email tracking pixels. Once the email has been opened, the image is automatically downloaded and sends a notification to the sender with the date and time the recipient opened the email.

Image tags and Chrome extensions work in a very similar way, except that with image tags you have to embed the code directly within the body of the email.

If you’re worried about affecting your overall message, or you’re just not a big fan of using images, don’t worry. Your image can be a small white square so it becomes invisible.

What the law now expects from your tracking pixel

Here’s the part most “how to track email opens” guides skip, and it’s the part that can cost you money. In its Guidelines 2/2023 on the technical scope of Article 5(3) of the ePrivacy Directive, the European Data Protection Board confirmed that loading a tracking pixel counts as gaining access to information on the recipient’s device, the same legal test behind cookie banners. The practical consequence: in the EU, open tracking for campaign analytics generally needs prior consent, and that consent has to be specific and informed rather than buried in a privacy policy. France’s CNIL went further in 2026, requiring prior consent as the rule with narrow exemptions for security and pure deliverability checks.

I’m not a lawyer, and enforcement varies by country. But the direction of travel is obvious, and “nobody will notice a 1x1 pixel” is a weak position to defend. This is also why lemlist is built GDPR-compliant, with unsubscribe handling and data processing terms that your legal team can actually read.

So keep these in mind to avoid violating your recipient’s privacy or risking your own information:

• •

  Collect consent where the law requires it, before the tracked email goes out

• •

  Use end-to-end encryption

• •

  Disclose tracking

• •

  Only track relevant activity (date and time the email was opened)

Bonus: read the signals without any tool

Tools get blocked. Apple Mail Privacy Protection pre-loads images, corporate gateways strip pixels, and some prospects read everything in a preview pane. On a bad week, a chunk of your open data is noise. So I also read the thread itself.

Four signals I trust more than a pixel:

• •

  Reply timing. A reply that lands 40 seconds after you hit send means your email was already open on their screen. A reply three days later, at 7am, means they batched your message with their backlog.

• •

  Quoted replies. When someone quotes a specific line from the middle of your email, you know exactly how far they read. That line is also your best hook for the follow-up.

• •

  A changed subject line, or a new person on the thread. Someone forwarded you internally. That’s a stronger buying signal than any open, because your email survived a second reader.

• •

  Indirect acknowledgment. A LinkedIn profile view, a connection request, or a visit to your pricing page right after send. They read it. They just didn’t answer yet.

None of this gives you a timestamp. All of it tells you where the prospect is, which is the only reason you wanted the timestamp in the first place.

Why tracking opens is essential for email outreach

You cannot improve what you cannot measure.

Measuring your campaign’s success starts with the open rate. It’s the pillar stat upon which all other stats are calculated.

Make it concrete. Say you send 500 cold emails and get 5 replies. Without open data, you have no idea which problem you’re looking at. If 400 people opened and 5 replied, your subject line is doing its job and your offer is the weak link, so you rewrite the body and the call to action. If only 60 opened, the body is irrelevant, because your subject line or your deliverability is the bottleneck. Same reply count, two completely opposite fixes. Guess wrong and you spend a month rewriting copy nobody ever saw.

You also can’t run a refined follow-up strategy if you don’t know whether your recipient opened your email. Ideally, you send a different follow-up based on this information. Advanced email automation tools like lemlist let you build conditional steps on criteria like whether your email was opened, so an unopened message triggers a new subject line while an opened one triggers a value-add nudge.

I stopped landing in spam after I learned this

I used to get extremely low open rates even after using read receipts or trackers.

Then it clicked. Extremely low open rates meant my emails were landing in spam. The tracking wasn’t broken. The delivery was.

So the real fix sits upstream of any tracker: authentication records, a warmed-up domain, sending volume that doesn’t spike, and copy that doesn’t trip filters. lemwarm handles the warm-up and keeps a steady reputation-building send pattern running in the background, while the Deliverability Hub checks your SPF, DKIM and DMARC setup before you launch anything.

I’ve put together an 8-step deliverability checklist to stay out of the spam folder for good. Work through it once, then re-run it every quarter. ⬇️

Final thoughts

Knowing how to check whether an email was seen is really about knowing what to do next. If nobody opens, test a different subject line. If they open and go quiet, rewrite the offer. If they open twice in ten minutes, pick up the phone.

Just remember that open rates aren’t the only thing that should define the overall success of your outreach, and since Apple and Gmail started pre-loading images, they’re noisier than they used to be. Check out what other metrics to track if you want to boost your outreach results and open new business opportunities.

Ready to see opens, clicks, replies and deliverability health in one place? Start a 14-day free trial and run your next campaign with the data in front of you.