The fastest way to stop unwanted emails

Most email services let you block a sender in two or three clicks, and the blocked person cannot tell you have done it. When you block an address in Gmail, Outlook, Yahoo Mail, or Apple Mail, their messages go straight to spam or a blocked folder — you will not see them, and they will not get a delivery failure notice.

The block works only for that exact email address. If someone sends from a different address, the block does not stop them. For that reason, blocking works best against individual senders you know personally or have dealt with before. For mass unwanted mail — newsletters you did not sign up for, marketing emails, or obvious spam — filtering rules and unsubscribe links are usually faster.

Key Takeaways

  • Blocking an email address in Gmail, Outlook, Yahoo, or Apple Mail takes two clicks and sends that sender's messages to spam without notifying them.
  • Blocking only stops the exact address you block, so spammers using new addresses each time will not be stopped by a block alone.
  • Unsubscribe links at the bottom of marketing emails remove you from legitimate mailing lists faster than blocking does.
  • Email filters can automatically sort or delete messages from certain senders or containing certain words, without you having to block each address individually.
  • If you receive threats, harassment, or repeated contact after blocking, save the messages and report them to your email provider or local police.

How to block a sender in Gmail

Open the email from the person you want to block. Click the three-dot menu icon in the top right of the email. Select "Block [sender's name]" from the dropdown menu. Gmail will move that sender's future emails to spam automatically.

If you have already deleted the email, you can still block the sender. Go to your Spam folder, open an email from that address, and use the same three-dot menu to block them. You can also block a sender by right-clicking their name or address anywhere it appears in Gmail and selecting the block option from the context menu.

To unblock someone later, go to Gmail Settings, click the Filters and Blocked Addresses tab, find the blocked address in the list, and click "Unblock" next to their name.

How to block a sender in Outlook and Outlook.com

Open the email from the sender you want to block. Click the three-dot menu (More actions) in the top right. Select "Block" or "Junk" depending on your version. Outlook will move their future messages to your Junk folder.

In Outlook.com (the web version), you can also block a sender by clicking the trash icon, then selecting "Block sender" when prompted. On the Outlook desktop app for Windows or Mac, right-click the sender's name in your inbox and choose "Block Sender" from the menu.

To see your blocked senders list in Outlook.com, go to Settings, then Mail, then Junk Email. Your blocked addresses appear there, and you can remove any block by clicking the X next to the address.

How to block a sender in Yahoo Mail and Apple Mail

In Yahoo Mail, open the email you want to block. Click the three-dot menu icon. Select "Block sender." Yahoo will send future emails from that address to spam.

In Apple Mail on Mac, open the email and click the Mail menu at the top. Select "Block Sender." On iPhone or iPad, swipe left on the email in your inbox, tap the trash icon, then tap "Block This Contact" when the option appears. Apple Mail will move blocked senders' messages to the trash folder automatically.

When blocking is not enough

Blocking works against one person sending from one address. If you receive unwanted email from many addresses, or from addresses that change, a block list will not stop them all. In those cases, create an email filter instead.

A filter can catch emails based on words in the subject line, the sender's domain (the part after the @ symbol), or content in the body of the message. For example, if you keep getting emails from different addresses at the same company domain, you can create a filter that catches anything from that entire domain and sends it to spam or deletes it automatically. Most email services let you create filters for free in your settings.

If you receive marketing emails from a legitimate company, look for an "Unsubscribe" link at the very bottom of the email. Clicking it removes you from their mailing list — this is faster and more permanent than blocking, because it stops the emails at the source rather than filtering them after they arrive.

Blocking does not stop all spam

Spammers often send from new addresses or use automated systems that generate thousands of addresses. Blocking one address stops only that one sender. If you block an address and then receive similar emails from a different address the next day, you are likely dealing with an automated spam system rather than a person.

For this type of spam, blocking individual addresses is not practical. Instead, use your email provider's spam filter settings to be more aggressive, or create filters that catch emails based on common spam phrases or sender domains. You can also mark unwanted emails as spam or junk — most email services learn from this and catch similar messages automatically in the future.

What happens after you block someone

When you block an email address, that sender's messages go to spam or a blocked folder. They do not receive a notification that you have blocked them. If they send you an email, it will appear to go through normally on their end — they will not see a bounce-back or error message.

The blocked person can still contact you through other means: phone, text, social media, or a different email address. Blocking only stops emails from that specific address. If someone is harassing you across multiple platforms or addresses, document the messages and report them to your email provider. Most services have abuse reporting tools, and serious cases can be reported to local law enforcement.

Frequently Asked Questions

Can someone tell if I have blocked them?

No. When you block an email address, the sender will not receive a notification. Their emails will appear to send successfully on their end, but you will not see them. The only way they would know is if you tell them or if they notice you never respond to their emails.

What is the difference between blocking and marking as spam?

Blocking stops all emails from one specific address and sends them to a blocked folder. Marking as spam tells your email provider that a message is unwanted, and the system learns to catch similar messages in the future. Marking as spam is better for mass unwanted mail; blocking is better for individual senders you know.

If I block someone, can they still see my emails?

Blocking only affects emails they send to you. If they send you a message, you will not see it. But if you send them an email, they will receive it normally. Blocking is one-way — it stops their incoming mail, not your outgoing mail.

Can I block an entire domain or company?

Most email services do not have a built-in "block entire domain" feature, but you can create a filter that catches all emails from a specific domain and sends them to spam. In Gmail, Outlook, and Yahoo, go to your filter settings and create a rule that matches the domain name (for example, @unwantedcompany.com) and automatically deletes or junks those messages.

What should I do if someone keeps contacting me after I block them?

If they use different email addresses to contact you after you block them, save those emails and report them to your email provider's abuse team. If the contact includes threats or harassment, you can also report it to local police. Most email services take repeated contact after blocking seriously and may take action against the sender's account.