The fastest way to block someone in Gmail

Open the email from the person you want to block. Click the three dots (more actions menu) in the top right of the email. Select "Block [sender's name]" from the dropdown. Gmail will move that sender's future emails to spam automatically, and you won't see notifications when they write to you.

That's the entire process. Once blocked, emails from that address go straight to your spam folder. If you change your mind later, you can unblock them the same way — open any email from that sender, click the three dots, and choose "Unblock."

Key Takeaways

  • Blocking someone in Gmail takes three clicks: open their email, click the three-dot menu, and select "Block [name]."
  • Blocked emails land in your spam folder automatically, and you won't receive notifications about them.
  • You can unblock a sender at any time by opening one of their emails and selecting "Unblock" from the same menu.
  • Blocking only affects your account — the sender won't know they're blocked and can still send emails to you.
  • If someone uses multiple email addresses, you'll need to block each address separately.

What happens when you block an email address

When you block someone, Gmail sends their emails to spam instead of your inbox. You won't see a notification when they send you a message. If you go looking in your spam folder, you'll still see their emails there — blocking doesn't delete them, it just hides them from your main view.

The sender has no way of knowing you blocked them. They won't get a bounce-back message or any other signal that you've blocked their address. From their perspective, their emails are being sent normally. This is different from unsubscribing from a mailing list, where the sender often gets notified.

Blocking emails from a group or mailing list

If you're getting unwanted emails from a group address or mailing list, blocking works the same way — open one email, click the three dots, and select "Block." However, if the list uses multiple sender addresses or rotates addresses, you may need to block each one separately as they appear.

For marketing emails or newsletters, look for an "Unsubscribe" link at the bottom of the email first. Unsubscribing removes you from the list entirely, which is cleaner than blocking. Blocking is better for personal emails from someone you don't want to hear from.

Unblocking someone if you change your mind

To unblock an email address, you need to find an email from that sender. Check your spam folder — their emails will be there. Open any email from them, click the three dots, and select "Unblock [name]." Their future emails will go back to your inbox normally.

If you've deleted all their emails and can't find one to unblock from, you can also manage your blocked senders list directly. Go to Gmail Settings (the gear icon in the top right), click "See all settings," go to the "Filters and Blocked Addresses" tab, and look for the list of blocked addresses there. You can unblock from that page.

When blocking isn't enough

If someone is harassing you or sending threatening messages, blocking is a good first step but may not be sufficient. Save the emails as evidence before blocking. If the harassment continues from different email addresses, take screenshots and consider reporting the behavior to Gmail or to law enforcement if the threats are serious.

Gmail also has a "Report phishing" option in the three-dot menu if someone is impersonating a company or trying to trick you into revealing information. Use that instead of or in addition to blocking if you suspect fraud.

Blocking on mobile Gmail

The process is the same on your phone or tablet. Open the email, tap the three dots (usually in the top right corner of the email), and tap "Block [sender's name]." The layout is slightly different depending on whether you're using Android or iPhone, but the option is in the same menu.

If you're using the Gmail app and can't find the three-dot menu, try swiping left or right on the email — some versions of the app show blocking options in a swipe menu instead.

Frequently Asked Questions

Can someone tell if I blocked them?

No. When you block someone, they won't receive any notification. Their emails will still appear to send normally from their perspective. They would only know if they tried to contact you through another method and you told them directly.

What if the person uses a different email address?

Blocking only affects the specific email address you blocked. If someone sends you emails from multiple addresses, you'll need to block each one separately as they arrive. There's no way to block an entire person or domain in Gmail's standard blocking feature.

Will blocking delete their old emails?

No. Blocking only affects new emails going forward. Any emails from that sender that are already in your inbox will stay there. Their old emails in spam will also remain unless you manually delete them.

Can I block emails by subject line or content?

Not with the block feature. However, you can create filters in Gmail Settings to automatically delete or label emails based on keywords, sender domain, or subject line. Go to Settings, click "Filters and Blocked Addresses," and create a new filter with your criteria.

Does blocking work the same way in Gmail on the web and the app?

Yes. The blocking feature works identically whether you're using Gmail in a web browser or the Gmail mobile app. The steps are the same, though the menu layout may look slightly different on mobile.