To block an email address on Yahoo Mail from a desktop browser, go to Settings > More Settings > Security and Privacy, then add the address under Blocked Addresses. On the Yahoo Mail app, mark the email as spam instead; the app doesn't support direct blocking. This guide covers every method available, including filters and domain blocking, so you can clear out the noise for good
For sales reps and account managers dealing with relentless inbox volume, getting on top of unwanted senders is a quick win. According to the Fyxer Admin Burden Index, 2026, a survey of 5,000 UK and US office workers, 50% of inbox activity is noise: 31% marketing emails and 21% notifications. Blocking the obvious offenders is step one.
How to block an email address on Yahoo: Step-by-step
Yahoo gives you four ways to cut unwanted senders out of your inbox. Which one to use depends on how persistent the problem is.
1. Block an email address from a desktop browser
Blocking an email address on Yahoo Mail is straightforward from a desktop browser. Follow these steps:
Log in to your Yahoo Mail account on your computer.
Click the Settings icon (gear symbol) in the top-right corner.
In the left-hand menu, click on Security and Privacy.
Under the Blocked Addresses section, click the Add button.
Enter the email address you want to block and click Save.
This will prevent emails from that address from appearing in your inbox. For more detailed instructions, refer to Yahoo's official help page on blocking and unblocking email addresses in Yahoo Mail:Yahoo Help
2. Block emails using the Yahoo Mail app
While the Yahoo Mail app doesn't allow you to directly block of email addresses, you can mark unwanted emails as spam to prevent them from appearing in your inbox:
Open the Yahoo Mail app on your mobile device.
Locate the unwanted email.
Tap the More icon (three dots).
Select Mark as Spam or Move to Spam.
Tip: Marking emails as spam helps Yahoo's algorithm identify and filter similar messages in the future.
3. Use filters to block certain types of emails
Filters allow you to automate the process of managing unwanted emails. If you want to block emails based on specific criteria, such as sender, subject, or keywords, you can create filters in Yahoo Mail:
In Yahoo Mail, click Settings → More Settings → Filters.
Click Add new filters.
Name your filter (e.g., "Blocked Senders").
Enter the criteria for the filter (e.g., specific email addresses, domains, or keywords).
Choose the action to take (e.g., Move to Trash or Delete).
4. Permanently block an email address
When the barrage of emails from a particular sender becomes too much, blocking an email address prevents future messages from that sender from appearing in your inbox. However, if you continue to receive emails from a blocked address, it may be due to email spoofing, where the sender's address is disguised. Here's what to do:
Identify the true email address of the sender.
Add the correct email address to your blocked list.
Consider using filters to block emails from specific domains or keywords.
For newsletters and marketing emails, unsubscribing is cleaner than blocking. It keeps your blocked list focused on genuine spam.
How to block an entire domain on Yahoo Mail
Blocking an individual email address handles a single sender. But if you're getting hit with emails from multiple addresses at the same domain, like noreply@example.com one day, offers@example.com the next, blocking by domain is the more efficient fix.
Free Yahoo Mail accounts can block up to 3 domains. Yahoo Mail Plus accounts can block up to 500. To add a domain to your blocked list:
Log in to Yahoo Mail on a desktop browser.
Click the Settings icon and select More Settings.
Go to Security and Privacy.
Under Blocked Addresses, click Add.
Type @domainname.com (including the @ symbol) and click Save.
Any email sent from that domain will no longer reach your inbox. If you've already used your 3 free domain slots, Yahoo Filters are the alternative: you can create a filter targeting emails from a specific domain and set the action to Delete or Move to Trash. That approach also has no cap, so it scales as your blocked list grows.
How to block emails on Yahoo on iPhone or Android
The Yahoo Mail app handles blocking differently from the desktop version, and the distinction matters.
Marking as spam on the app
The Yahoo Mail mobile app doesn't have a dedicated block button for individual senders. The closest equivalent is marking an email as spam:
Open the Yahoo Mail app on your iPhone or Android device.
Find the email from the sender you want to stop.
Tap the More icon (three dots).
Select Mark as Spam or Move to Spam.
This moves the email and tells Yahoo's filter to treat similar messages the same way going forward. It won't guarantee that sender never reaches you again, but it builds the filter's accuracy over time.
Blocking via the mobile browser
If you need to block a specific address outright, the most reliable way to do it on mobile is through your phone's browser rather than the app.
Open Safari (iPhone) or Chrome (Android) and go to mail.yahoo.com.
If prompted, request the desktop version of the site.
Log in, then follow the same steps as the desktop method: Settings > More Settings > Security and Privacy > Blocked Addresses > Add.
This gives you full access to Yahoo's blocking and unblocking tools, including domain management, which the app doesn't support for standard accounts.
What happens when you block someone on Yahoo Mail
A few things worth knowing before you hit block.
Blocked emails go to Trash, not a hidden folder: When you block a sender, their future emails are moved to your Trash automatically. They don't sit in a separate blocked folder, they go straight to Trash and will be deleted when your Trash clears.
The sender has no idea they've been blocked: Yahoo doesn't notify them. From their side, the email appears to send normally.
Old emails from that sender are not affected: Blocking is forward-looking. Any messages already in your inbox stay there. You'd need to delete those manually.
If you unblock someone, messages they sent while blocked are not restored: They went to Trash, and unless you saved them, they're gone. If you blocked someone by mistake and need to find their recent emails, check your Trash folder before it clears.
Blocking targets exact email addresses: If a spammer switches to a different address, the block doesn't follow them. That's when domain blocking or filters become the more reliable option.
Block emails with confidence
Blocking specific senders handles the most obvious problem. But for anyone whose inbox consistently fills with noise, thanks to newsletters, marketing emails, notifications, and automated messages, the underlying issue is volume, not just individual senders. Filtering by domain and using Yahoo's spam marking together is the most reliable combination. Once those are in place, you'll spend a lot less time deciding what to read.
Blocking email addresses on Yahoo FAQs
Can I block someone on Yahoo Mail without opening their email?
Yes. Right-click the email in your inbox, select Block Sender, and confirm. This will prevent future emails from that sender from appearing in your inbox.
Why do I still receive emails from blocked senders?
Spammers sometimes change email addresses or use spoofing techniques to bypass blocks. Using filters to delete emails by domain or keyword can help catch these variations.
Can I block an entire domain in Yahoo Mail?
Yes. Add @domainname.com in the Blocked Addresses section to block all emails from that domain.
Does blocking an email delete old messages?
No. Blocking prevents future messages but does not delete previously received ones.
Can I unblock someone later?
Yes. Go to Settings → More Settings → Security and Privacy, then delete the address from the Blocked list.
Is marking as spam the same as blocking?
No. Spam marking trains Yahoo’s algorithm, while blocking manually prevents emails from specific addresses.
What’s the difference between Yahoo’s spam filter and manual blocking?
Spam filters work automatically using behavior analysis; manual blocking gives you direct control over specific senders.
Does Yahoo Mail have a limit on blocked addresses?
Yes. Yahoo Mail caps blocked addresses at 1,000 per account, and free accounts can only block up to 3 domains. If you hit the limit, new blocks will fail. At that point, Yahoo's Filters are the better option, since there's no cap on how many you can create.
