How to Know If Someone Blocked You on Gmail (and What Happens When You Block Someone)

There is no definitive way to know if someone has blocked you on Gmail, because Gmail never notifies the sender. Your email is sent normally, appears in your Sent folder, and produces no bounce or error.

What you can do is weigh a few indirect signals, none of which is proof on its own. This guide covers what blocking actually does, what a bounce really means, which signals are worth paying attention to, and what to do next.

What happens when someone blocks you on Gmail

When a Gmail user blocks an address, they open a message from that sender, use the three-dot menu and choose "Block" followed by the sender name. From that point, future messages from that address go to their Spam folder. They are not rejected, and the sender is not told.

From your side, nothing looks different. The email leaves your outbox, shows as sent, and no delivery failure comes back. The only visible effect is silence, which is also what you would see if the person were busy, on holiday or ignoring you for unrelated reasons.

Where do blocked emails go in Gmail?

Blocked emails go to the Spam folder of the person who blocked you. They stay there until Gmail deletes them automatically, which happens after 30 days. The recipient can still open the Spam folder and read them if they choose to, but Gmail does not alert them that anything new has arrived there.

The block applies to the sender address only. Messages from a different address, even one at the same company, are treated separately.

This is also why a blocked email is easy to miss. Spam is a folder most people rarely open, so a message filed there can sit unseen until it expires. The sender sees a normal sent email, and the recipient sees nothing at all, which is exactly what a block is designed to do.

If you block someone on Gmail, do they know?

No. The person you block receives no notification, no bounce and no message of any kind. Their emails to you simply stop appearing in your inbox and collect in Spam instead.

How to unblock someone

1. 1Open Gmail and go to Settings, then See all settings.
2. 2Open the Filters and Blocked Addresses tab.
3. 3Tick the address you want to unblock.
4. 4Choose Unblock selected addresses.

There is a shortcut as well. Open any message from that person, including one sitting in Spam, and choose Unblock sender.

Blocking is not the same as other actions

• Unsubscribing asks the sender to stop mailing you. It does not stop delivery by itself.
• A filter is a rule you set up to label, archive, forward or delete matching mail. It does exactly what you told it to and is separate from blocking.
• Report spam moves one message to Spam and tells Gmail it looks unwanted. It is a signal about that message rather than a standing rule for the address.

Can someone block your email?

Yes, in two ways. An individual can block your address in their own mailbox, as described above. And an organisation can block you at the server level: a company email administrator, such as a Google Workspace admin, can block an address for everyone at that organisation.

An individual block never produces a bounce. An organisation-wide block might, depending on how the administrator has set it up, but it might also be silent. Neither outcome is guaranteed.

How to tell if someone blocked your email

Because nothing is reported, you are looking for a pattern rather than a message. These are the signals worth weighing, and none of them is proof.

Replies stopped abruptly

If someone replied to most of your emails within a day or two and then stopped completely, the change is worth noticing. It fits a block. It fits equally well with a change of job, a full inbox, a bad month or a decision that the conversation is over.

Your open tracking went flat

If you use open tracking, look at the history for that person. If their opens were consistent and then stopped entirely across several emails, that is consistent with a block. Gmail generally does not load remote images for messages it has filed as Spam, so an open-tracking pixel usually does not fire even if the person glances at the message in the Spam folder.

That is only one explanation. A spam filter that is not a block, or simply not reading your emails, produces the same picture. For how the underlying mechanism works, see how email open tracking works.

Check whether it is you, not them

Before concluding anything about one person, look at everyone else. If many recipients have gone quiet at once, the problem is almost certainly your deliverability, not a block. Your messages may be landing in Spam for everybody. Start with why emails land in spam and the email deliverability checklist.

How to know if your email is blocked

It helps to separate two different situations: being blocked by a person, and having a message rejected by a server.

What a bounce actually means

A bounce message, such as "Address not found" or a 550 error, is not a personal Gmail block. It usually means the address is wrong, misspelt or has been deleted, or that a company mail server refused the message. If you see one, check the spelling first, then try the address through another route.

If the bounce names a policy or says the message was rejected by the recipient organisation, that can point to an administrator-level block. It can also point to your own sending reputation. The text of the error is more useful than the fact of the bounce, so read it in full.

Quiet versus blocked

If there is no bounce, the email was accepted. After that it can land in the inbox, in Spam or in a promotions tab, and the person can read it, ignore it or never see it. A block is only one of several outcomes that look identical from your side. If you are sending sales or outreach email, email tracking not working in Gmail explains why a tracker can show nothing even when a message was read.

What to do if you think you have been blocked

The ethics here are fairly simple.

• One short note on another channel is fine. If you already talk to this person somewhere else, such as a messaging app or LinkedIn, a brief message asking whether your email arrived is reasonable. Keep it light and do not push.
• Do not create a new address to get around a block. If someone has blocked you, that is the answer. Sending from a fresh address after being blocked is the kind of behaviour that turns a quiet situation into a real problem.
• Never write "I saw you opened my email" to anyone. Open data is for your own timing. Quoting it back to a person reads as surveillance and ends the conversation.

If you have no other channel and the contact is not essential, the sensible move is to stop. When to stop following up covers how to make that call cleanly. If you do want to try once more before you stop, a polite message built from a follow-up email after no response is the right shape: short, specific and easy to decline.

What tracking can and cannot tell you

MailSenseAI tracks opens, clicks and replies per thread inside Gmail, filters scanner and prefetch traffic so those do not inflate the numbers, and never adds a footer to your emails on any plan. Tracking is free and unlimited.

It cannot tell you that you were blocked, because nothing in Gmail reports that. What it can show is whether your emails to someone are still being opened, which helps you separate a person who has gone quiet from a problem with your own sending.