How to Block Emails on Gmail (Web, iPhone, Android)

To block emails on Gmail, open a message from the sender, click the three-dot "More" menu at the top right of the message, and choose Block "[sender]". The steps are identical in the Gmail app on iPhone and Android. Here is the catch most guides bury: blocking does not stop the sender. Gmail keeps accepting their mail and silently routes it to Spam, where it still arrives, sits for 30 days, and still counts against your storage.

Blocking a sender in Gmail is a routing rule, not a wall: Gmail still accepts the sender's mail — it just lands in Spam instead of your inbox.

That distinction decides which button you should actually press. This guide covers the exact block steps on all three surfaces, what happens behind the scenes, how to unblock, and a three-button decision table — block, report spam, or unsubscribe — because only one of the three stops the sending.

How do you block an email address in Gmail on the web?

On a computer, per Google's official instructions:

1. Go to gmail.com and open a message from the sender you want to block.
2. At the top right of the message — next to the Reply arrow — click More (the three vertical dots).
3. Click Block "[sender name]".
4. Confirm in the dialog that appears.

That is the whole procedure. Google's own wording on what happens next is short: "After you block a sender, all future emails from them go to Spam." Messages already in your inbox stay exactly where they are.

You can review everyone you have ever blocked in one place: Settings → See all settings → Filters and Blocked Addresses. The blocked list lives at the bottom of that page, with a checkbox next to each address.

How do you block emails in the Gmail app on iPhone or Android?

The mobile steps mirror the web, and they are the same on iPhone and iPad as on Android:

1. Open the Gmail app and open a message from the sender.
2. Tap More — the three dots at the top right of the message itself, next to Reply. (Not the three dots in the app's top bar; that is a different menu.)
3. Tap Block "[sender name]".

To unblock on mobile, repeat the same steps — the menu item flips to Unblock "[sender name]" for anyone you have already blocked. There is no separate blocked-senders screen in the mobile apps; the full list only appears in web settings.

What actually happens when you block someone on Gmail?

Less than the word "block" implies. Here is expectation versus reality:

What you might expect	What Gmail actually does
The sender is stopped	No. Gmail keeps accepting their mail and routes it to Spam
The sender is notified	No. There is no bounce and no signal — your inbox just goes quiet
Old emails disappear	No. Existing messages stay wherever they were
The mail is gone	Not immediately. It sits in Spam and is auto-deleted after 30 days
Your storage is freed	No. Spam and Trash count toward your Google Account storage until deleted

Two of these deserve a closer look.

First, storage. Google's storage documentation is explicit that your quota — 15 GB free, shared across Gmail, Drive, and Photos — includes "Gmail messages and attachments, which includes your Spam and Trash folders." A blocked newsletter that keeps sending image-heavy emails is still eating your quota; you have hidden it, not stopped it.

Second, silence. The sender receives no error, so to them the send looks successful. That is deliberate — it prevents harassers from confirming they reached you — but it also means a legitimate mailer has no idea you stopped wanting their mail. They keep sending forever, and Gmail keeps quietly filing it.

Does blocking emails on Gmail work?

Blocking works for exactly one scenario: a specific, persistent address you never want to see again. For everything else, it underdelivers.

Where it works. An ex-colleague, a pushy salesperson, one aggressive recruiter — anyone who emails from the same address every time. Block them once and their mail reliably disappears into Spam.

Where it fails. Gmail's block matches the exact address, not the person or the operation behind it. Actual spammers rotate sending addresses constantly, so each block is obsolete by the next campaign — a losing game when spam consistently accounts for nearly half of global email traffic. And for newsletters and promotional mail, blocking treats the symptom: the sender keeps mailing you, your Spam folder keeps filling, and your storage keeps draining.

So "does blocking emails on Gmail work?" — as a hide button, yes. As a stop button, no. For that, you need the right tool for the sender type.

Should you block, report spam, or unsubscribe?

Gmail gives you three buttons for unwanted mail, and they do three different jobs. Most people press the wrong one. Here is the decision table:

The sender is...	Press	What it actually does
A stranger you never opted into, mailing from one persistent address	Block	Routes their future mail to Spam. The sending continues; you stop seeing it
Deceptive, scammy, or rotating through addresses	Report spam	Trains Gmail's filter — Google receives a copy of the message and uses it to catch similar mail, for you and everyone else
A legitimate business you once signed up for	Unsubscribe	The only option of the three that stops the emails from being sent at all

Block is a personal routing rule. It affects only your mailbox and only that exact address.

Report spam is a signal, not a rule. Google's documentation notes that when you report spam, a copy of the message goes to Google for analysis, and Gmail gets better at catching similar mail. Against rotating-address spammers, this beats blocking, because the filter learns patterns rather than memorizing one address. For genuinely malicious mail, this is also the responsible choice — your report protects other inboxes too.

Unsubscribe is the only button that reaches the sender. Gmail shows its Unsubscribe option next to the sender's name when the message carries a valid List-Unsubscribe header — the mechanism specified in RFC 8058, which lets your mail client send a one-click unsubscribe request with no landing page and no "are you sure" maze. Google requires senders of 5,000 or more messages a day to support one-click unsubscribe and to keep spam-report rates under 0.3%, and recommends that senders fulfill unsubscribe requests within 48 hours. Gmail's own docs note it can still take a few days for mail to stop after you unsubscribe, and Gmail now also offers a manage subscriptions view that lists your subscription senders in one place.

One important boundary: only unsubscribe from senders that look legitimate. For anything deceptive, report spam instead — we cover the reasoning, and the rare cases where unsubscribing can backfire, in does unsubscribing from emails work.

How do you unblock emails in Gmail?

Unblocking is symmetric with blocking, plus one bulk option on the web:

From any message (web and mobile): open a message from the blocked sender — check Spam, since that is where their mail now lives — tap More at the top right of the message, then Unblock "[sender name]".

From settings (web only): Settings → See all settings → Filters and Blocked Addresses → check the box next to each address → Unblock selected addresses. This is the fastest way to clean up several blocks at once, and the only place you can see the full list.

After unblocking, future mail returns to your inbox. Messages that already landed in Spam stay there — move them out manually if you want them, before the 30-day auto-delete removes them.

What if you want the emails to stop, not just hide?

Then the block button is the wrong tool, and the unsubscribe path is the honest one — pressed at scale, sender by sender, until your inbox only contains mail you chose. Our master walkthrough for that cleanup is how to stop spam emails.

We should disclose an interest here: we parse List-Unsubscribe headers for a living. Flick (flicked.email) is a swipe-to-triage email client where unsubscribing from a sender is one swipe — it reads the same RFC 8058 header that powers Gmail's own unsubscribe button, which we unpack fully in one-click unsubscribe explained.

And because an unsubscribe request is only as good as the sender's willingness to honor it, we are building the Exit Gap Index. It publishes A–F grades only after a sender has been measured; untested senders stay visibly ungraded. The public research methodology explains the evidence rule.

FAQ

Will the sender know I blocked them on Gmail?

No — Gmail never notifies a sender that they have been blocked. Their messages are accepted normally and routed to your Spam folder, so from their side, delivery looks successful. There is no bounce, no error, and no read-state change they can detect.

Does blocking someone on Gmail delete their emails?

No — blocking only redirects future messages to Spam and leaves existing ones untouched. Mail from blocked senders sits in Spam until Gmail's automatic cleanup deletes it after 30 days. Until then, it still counts toward your storage quota along with everything else in Spam and Trash.

Can you block an entire domain in Gmail?

Not with the Block button, which matches one exact address — but a filter can do it. In Gmail on the web, go to Settings → See all settings → Filters and Blocked Addresses → Create a new filter, put @example.com in the From field, and choose Delete it (or Skip the Inbox) as the action. That catches every address at the domain, which the per-address block cannot.

Why do blocked emails still show up in my Spam folder?

Because Gmail's block is a routing rule, not a refusal — the mail is still accepted, just filed as Spam. Gmail deliberately keeps delivering to Spam rather than rejecting outright, partly so you can recover false positives. If seeing them bothers you, remember the folder self-empties on a 30-day cycle.

Is it better to block or unsubscribe from newsletters?

For a legitimate newsletter, unsubscribe — it is the only action that stops the sender from mailing you at all. Blocking just reroutes each new issue to Spam, where it keeps consuming storage until auto-deletion. Reserve the block for senders who ignore unsubscribe requests or who you never opted into — the Exit Gap Index we link above tracks which senders are which.