How blocking works in the major email services

Blocking in email stops a sender from reaching your inbox. When you block someone, their messages go to spam automatically, and in most services they cannot see whether you read their mail or whether you are online. The exact mechanics differ slightly between Gmail, Outlook, and Apple Mail, but the outcome is the same: you will not see their messages unless you go looking for them in your spam folder.

Blocking is not the same as unsubscribing. An unsubscribe link removes you from a mailing list run by a business or organization. Blocking is for individual senders — people, not services. If someone keeps emailing you after you have asked them to stop, blocking is the right tool. If you are getting unwanted mail from a company, look for the unsubscribe link at the bottom of the email first.

Most email services let you block someone in seconds, directly from the message. You do not need to go into settings or create a filter manually. The blocked sender's future messages land in spam, and older messages from them stay where they are unless you delete them.

Key Takeaways

  • Blocking a sender in Gmail, Outlook, or Apple Mail takes one or two clicks from the message itself and sends their future mail to spam.
  • Blocked senders cannot tell you have blocked them, and their messages do not appear in your inbox or notification list.
  • Blocking affects only that one email address, so if someone emails you from a different account, you will still receive it.
  • You can unblock someone later through your email settings if you change your mind.

Blocking someone in Gmail

Open the email from the person 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 to spam and automatically send all future mail from that address to your spam folder.

If you want to block someone whose email you have not received yet, you can create a filter instead. Go to Settings, then Filters and Blocked Addresses, and click Create a new filter. Enter their email address, then choose Delete or Skip the Inbox (send to spam). This works the same way as blocking but requires a few more steps.

To unblock someone in Gmail, go to Settings, then Filters and Blocked Addresses. Find the blocked address in the list and click Unblock next to it. Their future messages will go to your inbox normally again.

Blocking someone in Outlook

Open the email from the sender you want to block. Click the three-dot menu (More actions) at the top right. Select Block. Outlook will move the message to your Junk folder and send all future mail from that address there automatically.

In Outlook on the web, you can also right-click the sender's name and choose Block from the context menu. On the Outlook desktop app for Windows or Mac, the process is the same: open the message, find the three-dot menu, and select Block.

To unblock someone, go to Settings, then Mail, then Junk email. Look for the Blocked senders list and find the address you want to unblock. Click the X next to their name to remove them from the blocked list.

Blocking someone in Apple Mail

Open the email from the person you want to block. Click the sender's name or email address at the top of the message. A small menu will appear. Select Block Contact. Apple Mail will send their future messages to your Junk folder.

On iPhone or iPad, open the email, tap the sender's name at the top, then tap Block this Contact. On Mac, the process is similar: click the sender's name and select Block Contact from the menu that appears.

To unblock someone on Mac, open Mail Preferences, go to the Junk Mail tab, and look for the Blocked list. Find the address and click Remove. On iPhone or iPad, go to Settings, Mail, then Blocked Contacts, find the person, and swipe left to delete them from the blocked list.

What happens when you block someone

Once you block a sender, their messages arrive in your spam or junk folder instead of your inbox. You will not get a notification when they email you. If you check your spam folder, you can still read their old messages, but new ones will pile up there automatically.

The blocked sender does not receive a notification that you have blocked them. Their email will not bounce back or show a delivery failure. From their perspective, the email went through normally. They may not realize you are not reading it unless they follow up and you do not respond.

Blocking only affects that specific email address. If the person emails you from a different account, you will receive it normally. This matters if someone has access to multiple email addresses or creates a new account to contact you.

Blocking versus other ways to manage unwanted email

Blocking is permanent until you unblock someone. If you are not sure you want to block permanently, you can create a filter that marks emails as read automatically or moves them to a folder without blocking. This gives you a middle ground: their mail still arrives, but it does not clutter your inbox or trigger notifications.

For mailing lists and newsletters, look for the unsubscribe link at the bottom of the email. Unsubscribing removes you from the sender's list and usually stops all future mail from that service. Blocking works too, but unsubscribing is cleaner because it tells the sender's system to stop, rather than just hiding the mail on your end.

If someone is harassing you or threatening you, blocking is a first step, but you may also want to report the email to your email provider or to law enforcement. Most email services have a Report Phishing or Report Abuse option in the message menu.

Blocking on mobile email apps

The steps are similar on phone and tablet. Open the email, tap the sender's name or the three-dot menu, and look for a Block option. On Gmail's mobile app, swipe left on the message and tap the block icon (a circle with a line through it). On Outlook mobile, open the message, tap the three dots, and select Block.

Apple Mail on iPhone and iPad works the same way as the Mac version: tap the sender's name and select Block Contact. Once you block someone on your phone, they are blocked across all your devices if you use the same email account.

Frequently Asked Questions

Can someone tell if I have blocked them?

No. Their email will not bounce back, and they will not receive a notification. They may suspect it if you stop responding, but the email system itself does not alert them. Some people test by sending another message to see if it goes through, but it will arrive in spam just like the others.

What if someone blocks me?

Your emails will still be sent, but they will land in their spam folder. You will not know for certain that you are blocked unless they tell you or you notice a pattern of no responses. If you need to reach someone who may have blocked you, try a different email address or contact method.

Can I block an entire domain or company?

Most email services do not have a built-in block-by-domain feature, but you can create a filter that catches all mail from a domain. In Gmail, create a filter with the pattern @companyname.com and have it skip the inbox or delete. In Outlook, you can add a domain to your blocked senders list if you access the advanced junk mail settings.

If I unblock someone, will I see their old messages?

No. Unblocking only affects future mail. Their old messages stay in your spam folder unless you move them back to your inbox manually. If you want to see what they sent while they were blocked, you will need to go to spam and retrieve it yourself.

Does blocking work the same way on all devices?

Yes, if you use the same email account. When you block someone in Gmail on your phone, they are blocked in Gmail on your computer too. The block syncs across devices. However, if you use different email apps or services on different devices, you may need to block them separately in each one.