Blocking stops unwanted mail from reaching your inbox

When you block a sender, their emails go straight to spam or a blocked folder instead of your inbox. The blocked sender cannot see that you blocked them — the email straightforward fails to arrive. Most email services let you block in seconds from any message, and the block stays in place until you remove it.

Blocking is different from unsubscribing. An unsubscribe link removes you from a mailing list run by a legitimate business. A block prevents one specific email address from contacting you at all, whether they are sending marketing mail, harassment, or scams. You can block anyone, and you do not need their permission.

Key Takeaways

  • Blocking a sender takes one or two clicks and sends their future emails to spam automatically.
  • Gmail, Outlook, and Yahoo all have block buttons in the message itself — you do not need to dig through settings.
  • A blocked sender will not know you blocked them; their email straightforward fails to deliver.
  • You can unblock a sender later if you change your mind, and the block does not affect emails already in your inbox.
  • Blocking one address does not block similar addresses, so scammers using many addresses may need multiple blocks.

How to block in Gmail

Open the email from the sender you want to block. Click the three vertical dots in the top right corner of the message. A menu appears with options including "Block [sender's name]". Click that option. Gmail moves the message to spam and adds the sender's address to your blocked list.

Future emails from that address will skip your inbox and go directly to spam. If you ever want to unblock them, go to Settings, then Filters and Blocked Addresses, find the address in the blocked list, and click Unblock next to their name.

How to block in Outlook and Outlook.com

Open the email from the sender you want to block. Click the three dots at the top right of the message. Select "Block" from the menu. Outlook moves the message to junk and remembers the address.

If you are using Outlook on a computer, you can also right-click the sender's name in the message and choose "Block Sender" from the context menu. To unblock later, go to Settings, then Mail, then Junk Email, find the blocked sender list, and remove the address.

How to block in Yahoo Mail

Open the email from the sender you want to block. Click the three dots in the top right corner. Select "Block sender" from the menu. Yahoo sends future emails from that address to spam.

To unblock a sender in Yahoo, go to Settings, then Security and Privacy, then Blocked Addresses. Find the sender in the list and click the X next to their name to remove the block.

What happens when you block someone

The sender's future emails go to your spam or junk folder automatically. You will not see a notification that they tried to email you — the message straightforward does not arrive in your inbox. The sender does not receive a bounce-back message or any other notification that you blocked them.

Emails from that sender that are already in your inbox stay there. Blocking only affects new messages going forward. If you want to remove old messages from a blocked sender, you can delete them manually or search for their address and delete all messages at once.

When blocking does not work the way you expect

Scammers and spammers often use a different email address each time they send. If you block one address and keep getting mail from similar addresses, you are likely dealing with someone using a new address for each message. Block each new address as it arrives, or mark the messages as spam instead — spam filters learn from your choices and may catch similar messages automatically.

If someone is harassing you from many addresses, blocking individual addresses becomes tedious. In that case, contact your email provider's support team. They can investigate patterns and may be able to block entire domains or take other action if the harassment violates their terms of service.

Blocking versus reporting spam

Blocking stops one sender from reaching you. Reporting spam tells your email provider that a message is unwanted, which helps them improve their spam filters for everyone. You can do both: report the message as spam and block the sender. The report helps the email service identify patterns, while the block protects your inbox when ready.

If you receive a phishing email or a scam, reporting it is especially important. Most email services have a "Report phishing" or "Report scam" option separate from the regular spam button. Using that option sends the message to security teams who investigate fraud.

Frequently Asked Questions

Can a blocked sender tell that I blocked them?

No. Their email straightforward fails to deliver. They do not receive a bounce-back message or any notification. From their perspective, the email went through normally — they have no way to know you blocked them.

What if I block someone by mistake?

You can unblock them anytime. In Gmail, go to Settings and Filters and Blocked Addresses. In Outlook, go to Settings, Mail, and Junk Email. In Yahoo, go to Settings and Security and Privacy. Find the address and click the unblock or remove option. Emails from them will start arriving in your inbox again.

Does blocking one email address block similar addresses?

No. Each address must be blocked separately. If someone emails you from john.smith@example.com and then from john.smith.2@example.com, you need to block both addresses. Blocking is address-specific, not domain-specific.

Will blocking delete emails already in my inbox from that sender?

No. Blocking only affects new emails going forward. Old messages from that sender stay in your inbox unless you delete them manually. You can search for their address and delete all old messages at once if you want to remove them.

What should I do if someone is harassing me from many different email addresses?

Contact your email provider's support team. Blocking individual addresses one at a time is not practical for ongoing harassment. Your provider may be able to investigate the pattern and take action against the person or block an entire domain if the harassment violates their terms of service.