What blocking an email actually does

Blocking an email address stops messages from that sender from reaching your inbox. The blocked messages usually go to spam or a dedicated blocked folder instead, so you won't see them unless you look. Different email services handle blocked mail slightly differently — Gmail sends them to spam, Outlook puts them in a junk folder, and some services delete them outright — but the result is the same: you don't get notifications and the messages stay out of your way.

Blocking is not the same as unsubscribing. When you unsubscribe from a mailing list, you're telling the sender's system to remove you from their distribution. When you block, you're telling your email service to filter out anything from that address. A blocked sender can still send to you; you just won't see it arrive.

Key Takeaways

  • Blocking an email address sends that sender's messages to spam or a blocked folder instead of your inbox, but does not prevent them from sending.
  • The steps to block differ by email service: Gmail uses the three-dot menu on a message, Outlook uses the junk button, and Yahoo uses the block option in settings.
  • Blocked senders can still email you from a different address, so blocking works best for spam and unwanted marketing, not for people determined to contact you.
  • You can unblock a sender at any time by finding them in your blocked list and removing them, usually in settings or account preferences.

How to block in Gmail

Open the email from the sender you want to block. Click the three vertical dots (the menu icon) in the top right of the message. Select "Block [sender's name]" from the dropdown menu. Gmail will move that message and any future ones from that address to your spam folder automatically.

If you want to block someone but don't have an email from them open, you can go to your Settings, click the Filters and Blocked Addresses tab, and add their email address manually. This is useful if you want to block someone preemptively or if you've already deleted their messages.

How to block in Outlook and Hotmail

Right-click on the email from the sender you want to block. Select "Junk" and then "Block Sender." Outlook will move that message to your junk folder and filter future messages from that address to junk as well.

On the web version of Outlook, open the message and click the three dots at the top. Choose "Junk" and then "Block." The process is the same; the blocked sender's mail goes to your junk folder instead of your inbox.

How to block in Yahoo Mail

Open the email from the sender you want to block. Click the three dots menu icon. Select "Block sender." Yahoo will add that address to your blocked list and send future messages from them to spam.

You can also manage your blocked senders list directly in Yahoo Mail settings. Go to Account Info, then Blocked Users, and add email addresses manually if you want to block someone without having received a message from them first.

How to block in Apple Mail and iCloud

In Apple Mail on Mac or iPhone, select the email from the sender you want to block. Click the flag icon or the three dots menu, then select "Block This Contact" or "Block Sender." On iCloud.com, right-click the message and choose "Block Sender."

Apple Mail also lets you manage blocked contacts in your Mail settings. Go to Preferences (Mac) or Settings (iPhone), find the Accounts section, and look for blocked senders or junk mail options to see your full list or add addresses manually.

What happens after you block someone

Once you block an address, messages from that sender stop appearing in your inbox. They go to spam, junk, or a blocked folder depending on your email service. You won't get notifications when they send you mail, and you won't see their messages unless you specifically check your spam or blocked folder.

The sender doesn't get a notification that you've blocked them. From their perspective, their email was sent successfully. They may not know why you're not responding, or they might assume the message went to your spam folder. If they email you from a different address, that message will come through normally unless you block that address too.

When blocking doesn't work and what to do instead

Blocking works well for spam and unwanted marketing emails, but it has limits. If someone is determined to contact you, they can create a new email address and send from that instead. Blocking each new address as it arrives is tedious and not a permanent solution.

If you're dealing with harassment or threatening messages, blocking alone may not be enough. Save the messages as evidence, report them to your email provider (most have abuse reporting options), and consider contacting local law enforcement if the messages are threatening. For workplace harassment, report to your HR department. Most email services take abuse seriously and can take action beyond just blocking — they can suspend accounts or investigate patterns of harassment.

How to unblock an email address

If you block someone by mistake or change your mind, you can unblock them. In Gmail, go to Settings, click Filters and Blocked Addresses, find the address in your blocked list, and click the X next to it to remove the block. In Outlook, go to Settings, find Junk Email, and remove the address from your blocked senders list. In Yahoo, go to Account Info and Blocked Users, then remove the address from that list.

Once you unblock an address, messages from that sender will arrive in your inbox normally again. Any messages that were sent while they were blocked will still be in your spam or junk folder, so you may want to check there if you're expecting something important from them.

Frequently Asked Questions

Can someone tell if I blocked them?

No. When you block someone, they don't receive a notification. Their emails appear to send successfully from their end. They might suspect you blocked them if you stop responding, but they won't know for certain unless they try to contact you from a different address or ask you directly.

What's the difference between blocking and reporting spam?

Blocking stops messages from one address from reaching your inbox. Reporting spam tells your email provider that the sender is sending unwanted bulk mail, which helps the provider identify and shut down spam operations. You can do both: report the message as spam and then block the sender.

If I block someone, can they still see my emails if I send them one?

No. Blocking is one-way on your end. If you've already sent them emails before blocking, they can still see those old messages. But if you try to send them a new email after blocking, most email services will warn you or prevent the send. Check your email service's behavior, as this varies.

Will blocking stop all emails from a company if they use multiple addresses?

No. Blocking works on individual email addresses only. If a company sends from multiple addresses (like support@company.com and noreply@company.com), you'll need to block each address separately. This is why blocking is better for individual senders than for large organizations.

Can I block an entire domain instead of just one address?

Most consumer email services don't offer domain-level blocking in their standard settings. Gmail, Outlook, and Yahoo all block individual addresses. If you need to block an entire domain, you may need to use filters or rules to automatically delete or move messages from that domain, which requires more technical setup than straightforward blocking.