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

Every email provider — Gmail, Outlook, Yahoo Mail, and others — has a built-in block feature that stops messages from a specific sender from reaching your inbox. When you block someone, their emails go straight to spam or a blocked folder, and you won't see notifications. The blocked person doesn't know they're blocked; their message just disappears on your end.

Blocking is different from unsubscribing. Unsubscribe removes you from a mailing list (usually marketing emails with an unsubscribe link at the bottom). Blocking stops all mail from one address, whether it's a person, a business, or a bot. You can block anyone — a person you know, a stranger, a company, or a spam sender.

Key Takeaways

  • Blocking an email address takes one or two clicks in Gmail, Outlook, Yahoo, or most other services, and the sender's future messages go to spam automatically.
  • The blocked sender will not receive a notification that you blocked them, and they will not know their messages are not reaching you.
  • If you block someone by mistake, you can unblock them just as easily, and their old blocked messages will still be in spam unless you move them.
  • Blocking works on your device or account only — if you use multiple email accounts or devices, you may need to block the same address in each one.
  • For persistent harassment or threats, blocking is a first step, but you may also want to report the sender to your email provider or to law enforcement.

How to block in Gmail

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

You can also block from your contact list. Go to Contacts, find the person, click their name, and select the block option from the menu. If you change your mind, go to Settings, then Filters and Blocked Addresses, find the blocked address, and click Unblock.

How to block in Outlook and Hotmail

Open the email you want to block. Click the three-dot menu (More actions) at the top right. Select "Block" or "Block sender." Outlook will send future emails from that address to your Junk folder.

To unblock, go to Settings, then Mail, then Junk Email. Find the blocked sender in the "Blocked Senders" list and remove them. If you use Outlook on your phone, open the email, tap the three dots, and choose Block Sender.

How to block in Yahoo Mail

Open the email from the sender. Click the three-dot menu icon. Select "Block sender." Yahoo will automatically send future emails from that address to spam.

To unblock, go to Settings, then Security and Privacy, then Blocked Addresses. Find the address you want to unblock and click the X next to it. The change takes effect when ready.

What happens after you block someone

Once you block an address, all new emails from that sender go straight to your spam or blocked folder. You won't see them in your inbox, and you won't get a notification. The sender can still send emails — they just won't know whether you're reading them or if they're reaching you at all.

Emails that arrived before you blocked the sender stay in your inbox unless you delete them. Blocking only affects new messages going forward. If you want to remove old messages from that sender, you can search for their address and delete those emails manually, or move them to trash or spam.

Blocking across multiple devices and accounts

If you use the same email account on your phone, tablet, and computer, blocking on one device blocks on all of them — the block is tied to your account, not the device. However, if you have multiple email addresses (like a work account and a personal account), you need to block the sender in each account separately.

Some email services sync blocks across devices after a delay of a few minutes to an hour. If you block someone on your phone and when ready check your computer, the block might not be active yet. Refresh your email or log out and back in to make sure the block is current.

When blocking is not enough

Blocking stops emails from reaching your inbox, but it does not stop someone from sending them. If you are being harassed, threatened, or receiving unwanted contact from someone, blocking is a good first step. You can also report the sender to your email provider — most services have a "Report spam" or "Report abuse" option that helps them identify patterns of harassment.

If the harassment is severe, involves threats, or continues after you block, consider reporting it to local law enforcement or to the FBI's Internet Crime Complaint Center (IC3). Keep records of the emails, including the sender's address and the date and time they arrived. Do not respond to the sender or engage with them further.

Frequently Asked Questions

Can the person I blocked tell that I blocked them?

No. When you block someone, their emails straightforward fail to arrive. They won't receive a bounce-back message or any notification that you blocked them. From their perspective, the email just disappears into the void.

What if I block someone by mistake?

You can unblock them when ready in your email settings. Go to your blocked senders list, find their address, and remove the block. Their old blocked emails will still be in your spam folder, but new messages from them will go to your inbox again.

Does blocking stop someone from seeing my emails if I send them one?

No. Blocking only stops incoming messages from reaching you. If you send an email to someone before you block them, they will receive it. Blocking does not prevent them from emailing you back — it just sends their reply to spam.

Can I block an email address that keeps changing?

If someone is using different email addresses to contact you, you will need to block each address separately. If the harassment is ongoing and they keep creating new addresses, report the pattern to your email provider and consider reporting it to law enforcement.

Will blocking stop text messages or calls from the same person?

No. Email blocking only affects email. If someone is contacting you through text, phone calls, or social media, you need to block them separately in each service. Most phones and messaging apps have their own block features.