The fastest way to block an email address

Open the email from the sender you want to block. Look for the three dots (⋯) in the top right corner of the email and click it. A menu will appear with several options — select Block sender. Yahoo Mail will when ready stop delivering emails from that address to your inbox and send them to spam instead.

That is the complete process. Once you block a sender, you will not see their emails unless you manually unblock them later. The blocked sender does not receive a notification that you have blocked them — the email straightforward fails to reach you.

If you cannot find the three-dot menu, you may be using an older version of Yahoo Mail. In that case, click the down arrow next to the sender's name at the top of the email, then select Block from the dropdown.

Key Takeaways

  • Click the three-dot menu in any email and select Block sender to stop receiving messages from that address when ready.
  • Blocked emails go to your spam folder, not deleted, so you can review them later if needed.
  • You can unblock a sender at any time by going to Settings and finding your blocked list.
  • Blocking works on individual email addresses, not entire domains, so a sender using a different address will still reach you.

Where blocked emails go

When you block a sender, their emails do not disappear — they land in your Spam folder instead. This matters because you can still see what they sent if you need to later. Open your Spam folder, find the email, and you will have the option to unblock the sender if you change your mind.

Yahoo Mail keeps blocked emails in spam for 30 days before deleting them permanently. If you think you might need to read something from a blocked sender, check your spam folder before that window closes.

How to unblock a sender

Go to the Settings icon (the gear symbol) in the top right of your Yahoo Mail inbox. Click Settings, then select Security and privacy from the left menu. Scroll down until you see Blocked addresses — this shows every sender you have blocked.

Find the address you want to unblock and click the X next to it. The sender will be removed from your blocked list, and their emails will start arriving in your inbox again. You can block and unblock the same address as many times as you need.

Blocking email addresses on mobile

The Yahoo Mail app on iPhone and Android works slightly differently. Open an email from the sender you want to block, then tap the three dots in the top right corner. Select Block sender from the menu. The process is the same as on a computer — the sender goes to spam when ready.

To unblock on mobile, open Settings (the gear icon), tap Manage blocked senders, and swipe left on any address to delete it from your blocked list. Some older versions of the Yahoo Mail app may label this option differently, but the location is always in Settings under security or privacy.

What blocking does and does not do

Blocking stops emails from reaching your inbox, but it only works for that specific email address. If someone sends you a message from john.smith@example.com and you block it, they can still email you from john.smith.work@example.com or any other address they control. You would need to block each address separately.

Blocking also does not prevent someone from seeing if you have read their emails or from knowing your email address exists. It straightforward redirects their messages to spam. If you need stronger privacy protection — such as hiding your read receipts or preventing someone from knowing you received their message — those are separate settings in Yahoo Mail's privacy menu.

When blocking is not enough

If you are receiving many emails from different addresses that appear to be from the same person or organization, blocking individual addresses becomes tedious. In that case, look for a pattern in the email addresses. If they all end with @spamcompany.com, you can create a filter to catch all mail from that domain at once.

Go to Settings, select Filters, and click Add new filter. Enter the domain (for example, @spamcompany.com) in the "From" field, then choose to send matching emails to spam. This catches any sender using that domain, even if they use different names before the @ symbol.

For harassment or threatening emails, blocking and filtering are not enough. Report the sender to Yahoo Mail by clicking the flag icon in the email, then selecting This is spam or abuse. Yahoo takes these reports seriously and may investigate the account.

Frequently Asked Questions

Can someone tell if I have blocked them?

No. When you block a sender, their emails straightforward fail to arrive in your inbox. They do not receive a bounce-back message or any notification that you blocked them. From their perspective, the email was sent successfully — they have no way to know it went to your spam folder instead.

What happens if I block someone by accident?

Go to Settings, select Security and privacy, find Blocked addresses, and click the X next to the address you want to unblock. The sender will be removed from your blocked list when ready, and their future emails will arrive in your inbox normally. Any emails they sent while you had them blocked are still in your spam folder.

Can I block an entire email domain instead of just one address?

Blocking works on individual addresses only, but you can use filters to block entire domains. Go to Settings, select Filters, and create a new filter with the domain (like @example.com) in the "From" field. Set it to send matching emails to spam. This catches anyone using that domain, even with different names.

Do blocked emails take up storage space in my account?

Blocked emails go to your spam folder, which counts toward your storage limit. Yahoo Mail keeps spam for 30 days before deleting it automatically. If you want to free up space when ready, open your spam folder and permanently delete the blocked emails instead of waiting for the 30-day window.

Can I block emails based on subject line or content instead of sender?

The block feature only works on sender addresses, but filters can catch emails by subject or content. Go to Settings, select Filters, and create a new filter. You can set it to match specific words in the subject line or body, then send those emails to spam automatically. This is useful for blocking newsletters or promotional content.