The fastest way to block an email sender on iPhone

Open the email from the sender you want to block in the Mail app. Tap the sender's name or email address at the top of the message, then tap "Block This Contact." iPhone will move that sender's future emails to your Trash folder automatically. You can also swipe left on an email in your inbox and tap the trash icon, then tap "Block This Sender" from the menu that appears.

Once you block someone, their emails stop showing up in your inbox, but they are not deleted — they go straight to Trash. You can still see them if you open the Trash folder, which means you can unblock the sender later if you change your mind. Blocking only works within the Mail app on that specific iPhone; if you use Gmail, Outlook, or another email service's own app instead of Apple Mail, you will need to block the sender inside that app.

Key Takeaways

  • Tap the sender's name at the top of an email, then tap "Block This Contact" to send their future messages to Trash.
  • Blocked emails are not deleted — they move to your Trash folder, so you can unblock the sender anytime.
  • Blocking in Apple Mail does not block emails from the same sender in Gmail, Outlook, or other email apps on your phone.
  • If you block someone by mistake, open Trash, find their email, tap their name, and tap "Unblock This Contact."

How blocking works across your Apple devices

When you block a contact in Mail on your iPhone, the block syncs to your other Apple devices if you use the same iCloud account. That means blocked senders will also go to Trash on your iPad and Mac. However, this only applies to the Mail app — third-party email apps like Gmail or Outlook keep their own separate block lists.

If you have multiple email accounts set up in Apple Mail (for example, a personal Gmail account and a work account), blocking a sender blocks them across all your accounts in that app. The sender cannot reach you through any of those email addresses using Apple Mail.

Unblocking a sender if you change your mind

Open the Mail app and go to your Trash folder. Find an email from the sender you want to unblock, tap their name at the top, and tap "Unblock This Contact." Their future emails will go back to your inbox instead of Trash. You can also go to Settings > Mail > Blocked Contacts to see your full block list and unblock anyone from there.

If you cannot find an email from the blocked sender in your Trash (perhaps because you emptied it), you can still unblock them through Settings. Tap Settings, scroll down and tap Mail, tap Blocked Contacts, swipe left on the name you want to unblock, and tap Delete.

When blocking does not stop all emails from a sender

Blocking only works if the sender uses the same email address every time. If someone sends you emails from multiple addresses — for example, firstname@company.com and firstname@personal.com — you will need to block each address separately. Blocking one does not block the other.

Spammers and scammers often use new email addresses to get around blocks, which is why blocking alone may not stop unwanted mail. If you receive a lot of emails from different addresses that look similar or have the same subject line, they may be coming from the same sender using different accounts. In that case, you might want to use Mail's VIP list or rules to filter them instead of blocking each one individually.

Using Mail rules and VIP settings as alternatives to blocking

If you want more control over where emails land without blocking the sender completely, you can create a Mail rule. Go to Settings > Mail > Rules, tap Add Rule, and set conditions like "if the sender contains [text]" or "if the subject contains [text]." Then choose an action like "Move to Trash" or "Move to a specific folder." This lets you automatically sort emails without blocking the sender.

The VIP list works the opposite way — it highlights emails from people you care about. Go to an email from someone, tap their name, tap "Add to VIP," and their future emails will show up in a separate VIP inbox. This does not block anyone, but it helps you focus on the messages that matter most.

Blocking does not work the same way in Gmail, Outlook, or Yahoo Mail apps

If you use Gmail's app instead of Apple Mail, blocking works differently. Open an email, tap the three dots at the top right, and tap "Block [sender's name]." Gmail will not show you their emails in your inbox, but they can still send them — they just go to a folder you do not see. To unblock, go to Gmail Settings > Blocked addresses and tap Unblock next to the sender's name.

Outlook and Yahoo Mail have their own blocking systems too. In Outlook, tap the sender's name and select "Block"; in Yahoo Mail, swipe left on an email and tap "Block." Each app manages its own block list separately, so blocking someone in Gmail does not block them in Apple Mail or Outlook. If you switch between apps, you may need to block the same sender in each one.

What happens after you block someone

Blocked senders cannot see that you blocked them — there is no notification sent to them. Their emails straightforward arrive in your Trash folder instead of your inbox. If they call or text you, those messages come through normally because blocking only affects email in the Mail app.

If a blocked sender emails you from a different email address, that new message will arrive in your inbox because it is technically from a different sender. Blocking is address-specific, not person-specific. This is why blocking is most effective for one-off unwanted emails rather than determined harassment from someone who has access to multiple email accounts.

Frequently Asked Questions

Can I block someone without opening their email?

Yes. Swipe left on the email in your inbox list, tap the trash icon, and then tap "Block This Sender" from the menu. You do not have to open the full email to block the sender.

Will the blocked sender know I blocked them?

No. Blocking is silent — the sender receives no notification. Their emails straightforward go to your Trash folder instead of your inbox. They have no way to know you blocked them through the Mail app.

What if I block someone by accident?

Open your Trash folder, find an email from that sender, tap their name, and tap "Unblock This Contact." You can also go to Settings > Mail > Blocked Contacts, swipe left on their name, and tap Delete to unblock them.

Does blocking on iPhone block emails on my Mac too?

Yes, if you use the same iCloud account and the Mail app on both devices. Blocked senders will go to Trash on your Mac as well. If you use a third-party email app like Gmail or Outlook, you will need to block them separately in that app on each device.

Can a blocked sender see if I read their emails?

No. Once you block someone, their emails go to Trash and they have no way to know whether you read them, deleted them, or even received them. Blocking is completely invisible to the sender.