How to Block Emails on Gmail, Outlook, Yahoo & More

Blocking unwanted emails is one of the most effective ways to maintain a clean inbox. Whether you are dealing with persistent spam, phishing attempts, or simply messages from senders you no longer want to hear from, every major email provider offers built-in blocking capabilities. This guide provides step-by-step instructions for Gmail, Outlook, and Yahoo Mail across desktop and mobile platforms, along with guidance on when to block, filter, or report.

How to Block an Email Address on Gmail

Gmail on Desktop

1. Open a message from the sender you want to block.
2. Click the three vertical dots (more options) next to the reply button in the upper right of the message.
3. Select "Block [sender name]".
4. Confirm by clicking Block in the dialog.

Future messages from this sender will be sent directly to your Spam folder. Gmail does not delete them automatically -- they remain in Spam for 30 days before automatic deletion.

Gmail on Mobile (iOS and Android)

1. Open a message from the sender.
2. Tap the three vertical dots in the upper right corner.
3. Tap "Block [sender name]".
4. Confirm the action.

The behavior is identical to the desktop version. Blocked messages go to Spam.

Gmail: Creating a Filter Instead

For more granular control, use Gmail's filter system:

1. Open the message and click the three dots, then "Filter messages like this".
2. Adjust the criteria (sender address, subject, keywords).
3. Click Create filter.
4. Choose an action: Delete it, Skip the Inbox, Mark as read, or Apply a label.
5. Optionally check "Also apply filter to matching conversations" to handle existing messages.

Filters are more powerful than blocking when you want to handle messages from an entire domain, messages containing specific keywords, or when you want to archive rather than spam them.

How to Block an Email on Outlook

Outlook Desktop (Classic)

1. Right-click the message from the sender you want to block.
2. Select Junk > Block Sender.
3. The sender is added to your Blocked Senders list.

To manage blocked senders: go to Home > Junk > Junk E-mail Options > Blocked Senders tab. Here you can add, edit, or remove addresses and domains.

Outlook on the Web (outlook.com / Microsoft 365)

1. Open a message from the sender.
2. Click the three dots (More actions) at the top of the message.
3. Select Block > Block [sender].
4. Confirm.

Alternatively, go to Settings (gear icon) > Mail > Junk email > Blocked senders and domains. Here you can manually add addresses or entire domains.

New Outlook for Windows

The New Outlook follows the same interface as Outlook on the Web. Right-click a message or use the three-dot menu to access the Block option. Blocked sender management is under Settings > Mail > Junk email.

Outlook Mobile (iOS and Android)

1. Open a message from the sender.
2. Tap the three dots at the top.
3. Select "Move to Junk" or "Block" (wording varies by version).

Note that Outlook mobile has historically had limited blocking capabilities compared to the desktop and web versions. For comprehensive blocking, use the web interface.

How to Block Emails on Yahoo Mail

Yahoo Mail on Desktop

1. Open a message from the sender.
2. Click the three horizontal dots (More) in the message toolbar.
3. Select "Block senders".
4. In the dialog, confirm by clicking Block.

You can also add addresses to your blocked list manually: click your profile icon > More Settings > Security and Privacy > Blocked addresses. Yahoo allows up to 500 blocked addresses.

Yahoo Mail Mobile

1. Open a message from the sender.
2. Tap the three dots (More).
3. Tap "Block sender" or "Mark as spam".

Blocked senders' messages are automatically routed to Spam.

Apple Mail

Apple Mail does not have a native "block sender" feature that works across all contexts. Instead:

1. Open a message from the sender.
2. Click the sender's name or address.
3. Select "Block Contact" from the dropdown.

This works for contacts in your address book. For more comprehensive blocking, create a Mail Rule: Mail > Settings > Rules > Add Rule. Set conditions based on sender address and the action to Move Message to Trash or Delete Message.

Block vs. Filter vs. Report Spam

These three actions serve different purposes:

Action	What It Does	When to Use
Block	Sends future messages from the sender to Spam or Junk	Known unwanted senders, one-time contacts you don't want to hear from again
Filter	Applies custom rules (delete, archive, label, forward)	Newsletters you sometimes read, automated notifications, domain-wide rules
Report Spam	Marks as spam AND sends a signal to the provider's spam detection systems	Actual spam, phishing, scam emails -- this helps protect other users

Always report genuine spam and phishing rather than simply blocking. Reporting contributes to the global spam filtering intelligence that Gmail, Outlook, and Yahoo use to protect all users.

When dealing with suspicious messages, verify the sender's authentication before engaging. Use our SPF Check and DKIM Verify tools to confirm whether the sender's domain has properly configured authentication. Legitimate senders with correct SPF and DKIM configurations are less likely to be spammers.

Bulk Blocking Tips

If you are returning to an inbox overwhelmed with unwanted messages:

• Gmail: Search for from:[email protected], select all matching conversations, and report as spam. Repeat for each unwanted sender. For domain-level blocking, create a filter matching from:@example.com with the "Delete it" action.
• Outlook: Use the Sweep feature. Right-click a message > Sweep > choose to delete all messages from the sender or keep only the latest.
• Yahoo: Use the blocked addresses settings to add multiple addresses or domains at once.
• Unsubscribe first. For commercial email, use the unsubscribe link before blocking. Under CAN-SPAM and GDPR, legitimate senders are required to honor unsubscribe requests. Blocking without unsubscribing means the sender still attempts delivery, consuming their sending resources and your spam filter's resources.

Blocking From the Sender's Perspective

If you manage email campaigns and your recipients are blocking your messages, this is a strong negative signal to mailbox providers. High block rates will degrade your sender reputation and reduce inbox placement for all recipients. Monitor your domain's email authentication with InboxTooling's SPF Check and DKIM Verify to ensure your infrastructure is properly configured, and maintain list hygiene to avoid sending to unengaged recipients.

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