# How to block a sender in Apple Mail on Mac: steps and fixes for Tahoe

> Learn how to block a sender in Apple Mail on Mac from the message header, check the blocked list, and fix senders that still get through.

URL: https://www.lazur.app/how-to/block-a-sender-in-apple-mail
Updated: 2026-11-07

In Apple Mail on Mac, open a message from the sender, hover next to their name, click the arrow, and choose Block Sender. Mail then flags their future messages as blocked, and your Junk Mail setting decides whether they land in the Trash or stay in your inbox.

## Quick answer

- Hover next to the sender's name in the message header, click the arrow, and choose Block Sender.
- Review blocks under System Settings > Privacy & Security > Blocked Contacts. Apple allows up to 3,000 senders.
- A block can fail when the Junk Mail setting, the allow list, or a changed address gets in the way.
- Some Tahoe users report Block Sender stopped working from macOS 26.3.1 through 26.5.2. Apple has not replied in that thread.
- No keyboard shortcut for blocking is documented, so use the pointer and the menu.

Applies to: Apple Mail on Mac, macOS Tahoe and newer. Time: 3 min. Difficulty: Easy.

## What you need

- Apple Mail on a Mac running macOS Tahoe or a newer release
- Automatic Junk Mail Filtering turned on in Mail
- One message from the sender you want to block

## How to Block a sender in Apple Mail on Mac in Apple Mail on a Mac

1. **Open a message from the sender.** In Apple Mail, open a message from the exact address you want to block. Blocks work on the address, so a message from a different address will not match. Use the search field if you cannot find a recent one. Tip: Look at the address, not just the display name. Two senders can share the same name.
2. **Hover next to the sender's name.** (Message header > Sender arrow) Move the pointer over the sender's name in the message header. A small arrow appears next to the name. Click the arrow to open the menu for that sender. Tip: Keep the pointer over the name until the arrow shows. It appears only on hover.
3. **Choose Block Sender.** (Sender arrow > Block Sender) In the menu, choose Block Sender. Apple's guide uses this label, and some third-party guides say Block Contact. Pick whichever item matches your menu. Tip: If the menu shows Unblock Sender, the sender is already blocked. You do not need to do anything else.
4. **Watch for the blocked icon.** Look at the message list. Apple says a blocked icon appears next to the sender, and a banner is added to their messages. If you see neither, check the blocked list in the next step. Tip: If the icon never appears on macOS Tahoe, read the Tahoe section on this page.
5. **Confirm the sender is on the blocked list.** (System Settings > Privacy & Security > Blocked Contacts) Open System Settings, select Privacy & Security, then select Blocked Contacts. Find the address in the list. Apple allows up to 3,000 blocked senders. Tip: If the address is missing, the block did not save. Use the troubleshooting section below.
6. **Choose what happens to blocked mail.** (Mail > Settings > Junk Mail) Open Mail, choose Mail > Settings, then select Junk Mail. Find the option for blocked senders. Choose Move to Trash to send their messages away, or the option labeled 'Mark as blocked, but leave it in my inbox' to keep them visible. Tip: Check this when blocked mail still arrives. A community thread names this setting as a common cause.
7. **Unblock a sender later.** (Sender arrow > Unblock Sender) Open a message from that sender, hover next to the name, click the arrow, and choose Unblock Sender. Apple says this reverses the block. You can also remove the address from Blocked Contacts in System Settings. Tip: Remove only the addresses you mean to unblock. Clearing the whole list is a different job.

## What blocking does in Apple Mail

Blocking is a filter on one email address. You tell Mail you do not want messages from that address in your way. Apple describes it as a way to keep your inbox focused, and it works on specific people or groups.

Once a sender is blocked, Mail shows a blocked icon next to them in the message list. It also adds a banner to their messages. That is how you tell at a glance that a block is active.

The part people miss is where the mail goes next. Mail can leave blocked messages in your inbox, or it can move them to the Trash. That choice lives in the Junk Mail settings, and it decides what you see every day.

- **3,000** Blocked senders Apple allows in Mail's blocked list on Mac ([source](https://support.apple.com/guide/mail/reduce-junk-mail-mlhlp1065/mac))
- **44.99%** Average share of spam in global email traffic in 2025, per Kaspersky ([source](https://securelist.com/spam-and-phishing-report-2025/118785/))

The list has a limit. Apple caps it at 3,000 senders, so a long list is worth reviewing now and then. Keep that number in mind before you block every newsletter that annoys you.

![Man at a MacBook reading email, the kind of inbox where you block a sender in Apple Mail on Mac](https://images.lazur.app/content-images/howto/block-a-sender-in-apple-mail/how-to-block-a-sender-in-apple-1-f5f6f7.jpg)

## Menu wording: Block Sender or Block Contact?

The same menu item goes by two names in the sources. Apple's Reduce junk mail page says Block Sender, and it describes Unblock Sender as the reverse. Clean.email, updated May 12, 2026, says Block Contact for the same arrow menu.

The LaptopMag guide from March 2021 is older. It describes opening Launchpad, searching for the sender, and right-clicking their name. It does not name a macOS version, so use it for orientation only. The exact label on the newest macOS release was not confirmed, so read the menu on your Mac and pick the matching item.

## Check the blocked senders list in System Settings

Apple keeps the blocked list in System Settings. Open System Settings, select Privacy & Security, then select Blocked Contacts. You can block up to 3,000 senders, according to Apple's Reduce junk mail page.

Review the list when you have a spare minute. A long list is the first thing to check when blocks stop working. An Apple Community thread from macOS Tahoe users reports that lists over 5,000 entries caused failures. That number comes from users, not from Apple, so treat it as a warning sign rather than a rule.

| Task | Where to look | Source |
| --- | --- | --- |
| Block a sender | Message header, then the sender arrow, then Block Sender | Apple Support, Reduce junk mail |
| Check the blocked list | System Settings > Privacy & Security > Blocked Contacts | Apple Support, Reduce junk mail |
| Send blocked mail to Trash | Mail > Settings > Junk Mail > Blocked | Clean.email, May 2026 |
| Block a whole domain | Mail > Settings > Rules, From contains, move to Trash | Apple Community thread 254896102 |
| Keyboard shortcut to block | None documented in these sources | No source lists one |

_Where each blocking task lives, by source_

## Find the block list in Mail settings

Some guides send you somewhere else. Clean.email says the permanent list lives in Mail > Settings > Junk Mail > Blocked. Click the plus button to add an address. Then choose what happens to mail from blocked addresses, such as moving it to the Trash.

Look in both places before you decide a block did not save. System Settings is where Apple points. Mail's Junk Mail tab is where the third-party guide points. If the address appears in one of them, the block is saved.

## Unblock a sender you blocked by mistake

Unblocking is the easy half. Open a message from the sender, hover next to their name, click the arrow, and choose Unblock Sender. Apple's guide says this reverses the block, and the blocked icon goes away.

You can also remove the address from Blocked Contacts. Be careful with bulk clean-ups. One Tahoe user who cleared more than 5,000 entries had to add some contacts back afterward. Write down the addresses you need to keep blocked before you delete anything.

## Why a blocked sender still gets through

A block can look broken when another setting overrides it. Work through these causes in order. Change one thing at a time, then wait for the next message from the sender to test.

- Automatic Junk Mail Filtering is off. Blocks depend on it, so turn it on in Mail's junk settings.
- The sender is on your allow list. An Apple Community thread says the allow list takes precedence over the block list.
- Trust email from my contacts is on. That option can override a block.
- The sender changed addresses. A block covers one address, so a new address gets through.
- The change has not synced yet. Servers can take up to an hour to apply changes, according to the same thread.
- Trust Junk mail headers in messages is off. The thread suggests turning it on under Mailbox Behaviors.

If none of those apply, the junk setting is the next place to look. Blocked mail that stays visible often means the setting is not Move to Trash.

## Block a whole domain with a rule

The sources for this page show no option to block a whole domain. A rule covers that job for a company that sends from many addresses. The workaround comes from an Apple Community thread.

- Open Mail and choose Mail > Settings.
- Select Rules, then add a new rule.
- Set the condition to From contains, and type the sender's address or domain.
- Set the action to move the message to the Trash, then save the rule.

A rule matches every address that contains your text. Say you want to stop a company that mails from news.example.com. A rule with From contains example.com catches all of its addresses. A block on one address does not. A broad match can also catch mail you want, so check the rule after a day.

## Tahoe bug: Block Sender missing or not working

Starting with macOS Tahoe 26.3.1, one Apple Community thread reports that Block Sender stopped showing the slashed-circle blocked icon. The poster says blocked addresses often did not appear in Blocked Contacts. Reports cover 26.3.1, 26.4.1 and 26.5.2.

No Apple staff reply appears in that thread, and no official fix turned up in the sources for this page. The reports rest on user posts. Treat them as evidence of a problem, not proof of its cause.

A top-ranked reply says that deleting older blocked contacts, more than 5,000 of them, restored blocking on Mac and iPhone. The poster noted that some contacts had to be added back afterward. Note your list before you start any clean-up.

![Person typing on a laptop with an email inbox open, where you can block a sender in Apple Mail](https://images.lazur.app/content-images/howto/block-a-sender-in-apple-mail/how-to-block-a-sender-in-apple-2-21154c.jpg)

## Mistakes people make when they block senders

- Blocking one address and expecting the company to stop. Many companies send from several addresses, so a rule for the domain fits better.
- Blocking a newsletter by hand instead of using its unsubscribe link, when one is present.
- Forgetting the Junk Mail setting, so blocked mail stays in the inbox with a banner.
- Blocking the wrong address. Check the address in the header, since two senders can share one display name.
- Blocking a bank, a school, or a colleague by accident. Read the address before you choose Block Sender.
- Building a very long list. Users report failures on large lists, and Apple caps the list at 3,000.

## Blocking in iCloud.com and other mail apps

This page covers the Mail app on Mac. A 2023 Honeypot post by Kirk Strauser says the iCloud.com Mail website has no sender block mechanism. It offers rules instead. That post is from March 2023, so check whether the website has changed before you depend on it.

The Mac Mail app works differently. The same post says it lets you mark senders as blocked, and junk filters can leave blocked mail in the Inbox or move it to the Trash. Other mail apps and webmail services have their own menus. The steps above will not match them.

## How much unwanted email is out there

Kaspersky's 2025 report measured spam as a share of global email traffic, and it fell slightly from the year before. That figure describes traffic across the internet, not your inbox. Blocks help with the senders you can name. Rules help with the ones that keep changing addresses.

## Ask Lazur where the button is

Lazur is a voice assistant for the Mac that lives in the notch. Hold Option and Command together and ask your question. Lazur sees your screen, answers out loud, and points at what you asked about.

Ask where something is, and Lazur draws a circle and a label around it. Ask how to do something, and Lazur guides you one click at a time, waiting for each click. Lazur does not click for you. You make every click.

Good questions for this page are where the arrow next to the sender's name is, what the Junk Mail setting does, or why a blocked sender still got through. Lazur answers from what is on your screen at that moment.

## Quick checklist before you block

- Open a message from the exact address you want to stop.
- Read the address in the header, not just the name.
- Turn on Automatic Junk Mail Filtering.
- Choose Move to Trash or leave the mail in your inbox in the Junk Mail settings.
- Wait for the next message from the sender to confirm the block works.

## What to do next

Start with the steps above, then check the Junk Mail setting and the blocked list. If blocks still fail, try a rule for the domain. For help with your own mail in the Mac app, read the [Apple Mail page](https://www.lazur.app/apps/apple-mail). Pricing details live on the [pricing page](https://www.lazur.app/pricing).

## If it does not work

- **Blocked sender still shows up in my inbox** Check, in order: Automatic Junk Mail Filtering is on, the sender is not on your allow list, Trust email from my contacts is not overriding the block, and the junk setting is Move to Trash. Allow up to an hour for changes, then test with the next message.
- **Block Sender is missing or the blocked icon never appears** This matches user reports from macOS Tahoe 26.3.1 through 26.5.2. Check Blocked Contacts for the address first. Some users report that clearing an oversized list helped, but this is not an Apple fix. Note the entries you keep before you clear anything.
- **Blocked mail stays in my inbox with a banner** Open Mail > Settings > Junk Mail and set the blocked-mail action to Move to Trash. The option labeled 'Mark as blocked, but leave it in my inbox' keeps the mail visible, which is what you are seeing.
- **I need to block a whole company** Use a rule instead. Go to Mail > Settings > Rules, set From contains to the domain, and move matching mail to the Trash. This is a workaround from an Apple Community thread, not a built-in domain block.
- **The sender's new address got through** A block covers one address. Block the new address, and add a rule for the domain if the mail keeps coming.
- **Blocking on the iCloud website does nothing** A 2023 Honeypot post says the iCloud.com Mail website has no sender block and offers rules instead. Use rules on the website, or manage blocks in the Mac Mail app.

## With Lazur

Lazur is a voice assistant for the Mac that lives in the notch. Hold ⌥ ⌘ and ask; it sees your screen, answers out loud, points at buttons and walks you through apps. Hold fn to dictate. Free for 3 days, then $18/month: https://www.lazur.app/download

- “Where is the Block Sender option?”: Lazur circles the arrow next to the sender's name and labels Block Sender, so you know where to click. (Points at it)

## FAQ

### Does blocking a sender delete their emails in Apple Mail?

Blocking does not delete anything on its own. Mail marks the sender as blocked, and your Junk Mail setting decides where new messages go. They either stay in your inbox or move to the Trash. Check that setting if blocked mail keeps piling up.

### How many senders can I block in Apple Mail?

Apple says you can block up to 3,000 senders. An Apple Community thread reports problems once lists grow past 5,000 entries, but that count comes from users, not from Apple.

### Why is Block Sender missing or the blocked icon not showing?

Apple Community users report this on macOS Tahoe 26.3.1 through 26.5.2. No Apple reply or official fix appears in the thread. Note the entries you want to keep, then try clearing old ones from Blocked Contacts.

### Will a blocked sender still reach me from a different address?

Often, yes. One Apple Community thread says a sender who switches addresses gets through. Block the new address, or add a rule that matches the sender's domain.

### Can I block a sender on iCloud.com?

A 2023 Honeypot post says the iCloud.com Mail website has no sender block. It offers rules instead. Check whether this has changed before you rely on it.

### Is there a keyboard shortcut to block a sender in Apple Mail?

No source for this page lists one. Use the pointer on the arrow next to the sender's name, then choose Block Sender from the menu.

## Sources

1. [Apple Support, Mail User Guide for Mac](https://support.apple.com/guide/mail/welcome/mac), Apple, checked 2026-11-07
2. [Apple Support, Reduce junk mail in Mail on Mac](https://support.apple.com/guide/mail/reduce-junk-mail-mlhlp1065/mac), Apple, checked 2026-11-07
3. [Clean.email, How to Block Emails on Mac: Apple Mail, Gmail & Outlook [2026]](https://clean.email/how-to-block-an-email-address/block-emails-on-mac), Clean.email, checked 2026-11-07
4. [LaptopMag, How to block a sender in Apple Mail](https://www.laptopmag.com/how-to/block-a-sender-in-apple-mail), LaptopMag, checked 2026-11-07
5. [Apple Community, Block Sender in Apple Mail No Longer Works](https://discussions.apple.com/thread/256284637), Apple Community, checked 2026-11-07
6. [Apple Community, Blocked email still coming through](https://discussions.apple.com/thread/254896102), Apple Community, checked 2026-11-07
7. [Honeypot, Apple won't totally block unwanted emails (Kirk Strauser, 23 March 2023)](https://honeypot.net/2023/03/23/apple-wont-totally.html), Kirk Strauser, checked 2026-11-07
8. [Kaspersky Securelist, Spam and phishing report for 2025](https://securelist.com/spam-and-phishing-report-2025/118785/), Kaspersky, checked 2026-11-07