Yes, you can block email addresses in every major email service

Every email provider — Gmail, Outlook, Yahoo Mail, Apple Mail — has a built-in block feature that stops messages from a specific sender from reaching your inbox. When you block someone, their emails go to spam or a blocked folder instead, and they typically won't know they've been blocked. The process takes less than a minute and requires no special software or settings changes.

The exact steps depend on which email service you use, but the principle is the same across all of them: you find the sender's address in a message they've already sent you, then select a block or report option from a menu. Some services let you block before you've received a message if you know the address, but most require you to block from an existing email.

Key Takeaways

  • Blocking works in Gmail, Outlook, Yahoo Mail, and Apple Mail by selecting the sender's address and choosing a block option from the menu.
  • Blocked emails typically land in spam or a dedicated blocked folder, not your inbox, and you won't see notifications from them.
  • The person you block will not receive a notification that you've blocked them, though they may notice their emails aren't being answered.
  • You can unblock someone later if you change your mind, and the process is just as quick as blocking.
  • Blocking is different from unsubscribing — blocking stops all mail from that address, while unsubscribing only removes you from mailing lists.

How to block in Gmail

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

If you want to block someone whose email you know but haven't received a message from yet, you can create a filter instead. Go to Settings (the gear icon in the top right), click See all settings, then the Filters and Blocked Addresses tab. Click Create a new filter, type their email address in the "From" field, click Create filter, then check the box next to Delete it or Skip the inbox. This sends their emails to trash or spam without you seeing them.

How to block in Outlook and Outlook.com

Open the email from the sender you want to block. Click the three-dot menu icon at the top of the message. Select Block. Outlook will move that message to your Junk folder and automatically send future emails from that address to Junk as well.

You can also block from your contacts list. Go to People, find the contact, click the three dots next to their name, and select Block contact. This prevents them from emailing you and also removes them from your suggested contacts when you're composing a message.

How to block in Yahoo Mail

Open the email from the person you want to block. Click the three-dot menu icon at the top of the message. Select Block sender. Yahoo will send that message and all future emails from that address to your Blocked folder.

Yahoo also lets you block from the sender's name directly. Hover over the sender's email address at the top of the message, and a small menu will appear with a block option. Click it to add them to your blocked list when ready.

How to block in Apple Mail

Apple Mail's blocking works differently depending on whether you're using it on a Mac, iPhone, or iPad. On a Mac, open the email, click the sender's name or address, and select Block Contact from the menu that appears. On iPhone or iPad, swipe left on the email in your inbox, tap the trash icon, then tap Block This Contact from the options that appear.

Once you block someone in Apple Mail, their emails are moved to the trash and future messages from them go there automatically. If you use iCloud Mail through a web browser, you can also right-click a message and select Block Sender from the context menu.

What happens after you block someone

Blocked emails typically go to a spam or junk folder rather than disappearing entirely. This means you can still see them if you check that folder, but they won't clutter your main inbox or trigger notifications. You won't receive alerts when a blocked person tries to email you — the message straightforward arrives in the blocked folder silently.

The person you blocked will not receive a message telling them they've been blocked. Their email will appear to send normally from their perspective, and they may not realize for some time that you're not responding. If they contact you through another method asking why you're not replying, that's often how they discover they've been blocked.

How to unblock someone if you change your mind

You can unblock someone at any time using the same settings where you blocked them. In Gmail, go to Settings, click Filters and Blocked Addresses, find the blocked address, and click Unblock. In Outlook, go to Settings, select Mail, then Junk email, and remove the address from the blocked senders list. In Yahoo, click the menu icon, select Blocked addresses, find the person, and click Unblock. In Apple Mail on Mac, go to Mail menu, select Preferences, click Junk Mail, and remove them from the blocked list.

Once you unblock someone, their emails will start arriving in your inbox again as if they were never blocked. Any messages they sent while blocked will still be in your spam or junk folder — unblocking doesn't retrieve those automatically.

Blocking versus other ways to manage unwanted email

Blocking is the strongest action you can take against a specific sender, but it's not always the right tool. If you're receiving marketing emails from a company you once bought from, unsubscribing is usually better than blocking — unsubscribe links are typically at the bottom of those emails and remove you from their mailing list permanently. If you're getting spam from random addresses that change frequently, marking messages as spam trains your email provider's filter to catch similar messages automatically, which is more effective than blocking individual addresses.

If someone is harassing you through email, blocking is a good first step, but you may also want to report the messages as spam or phishing to your email provider. Most services have a Report phishing or Report abuse option that sends the message to their security team. If the harassment continues or escalates, you can also contact local law enforcement.

Frequently Asked Questions

Will the person I block know that I blocked them?

No, they won't receive a notification. Their emails will appear to send normally from their end, but you won't see them. They may eventually realize they're blocked if they notice you're not responding and try contacting you another way, but the email service itself won't tell them.

Can I block someone's email if I don't have their address?

Most email services require you to block from an existing message, so you need to have received at least one email from them first. If you know their address but haven't received mail from them, you can create a filter (in Gmail) or add them to a blocked list manually (in Outlook and Yahoo) without needing a message from them.

What's the difference between blocking and marking as spam?

Blocking stops all mail from one specific address, while marking as spam trains your email provider's filter to catch similar messages from that sender and others like them. Blocking is more direct and when ready, while spam filtering improves over time as you mark more messages.

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

Most consumer email services don't have a built-in domain-blocking feature, but you can create filters to block all addresses from a domain. In Gmail, create a filter with "from:@domain.com" in the From field, then delete or skip those messages. Outlook and Yahoo have similar filter options in their settings.

If I block someone and then unblock them, will they see old messages I didn't respond to?

No. Unblocking only affects future emails — it doesn't change what happened to messages they sent while they were blocked. Those messages will still be in your spam or junk folder, and they won't know you've unblocked them unless you contact them directly.