How to block or unblock an email address in Yahoo Mail
It's easy to prevent incoming emails or messages from specific senders that you’d rather not see. This article shows you how to block an email address in your Yahoo! Mail so that you will never see any more messages from those senders again.
How to block an email address in Yahoo
Step 1: Go to Yahoo and log into your Yahoo Mail.
If you don't know how to login to your Yahoo mail account, read this tutorial: Yahoo Mail Login.
Step 3: Open an email from the person you want to block. If you already know this person's email address, skip to Step 5.
Step 4: Right-click the email address at the top and select Copy email address.
Step 5: Click Settings in the upper-right corner of the page. A drop-down menu will appear.
Step 6: Select More Settings.
Step 7: Click Security and privacy in the left column.
Step 6: Click + Add near Blocked addresses. Enter or paste (Right click/Paste or Ctrl+V) the email address that you want to block into the Address field.
Step 7: Click Save.
You will no longer receive any message from this email address in your inbox. You can block all addresses from a single business or domain, not just @yahoo.com.
How to unblock an email address in Yahoo
Step 1: Go to Yahoo and log into your Yahoo Mail account.
Step 2: Click Settings in the top right corner of the page and select More Settings.
Step 3: Click Security and privacy.
Step 4: Hover mouse over the email address that you wish to unblock and click the trash icon.
What happens when you block someone in Yahoo?
Once you block someone, you won't get any emails from them. And they won't be notified that they are being blocked. However, they may still tell if their email has been blocked. When a person in your blocked list sends you an email, he/she may get an alert saying that the email was undeliverable or that there was a server error.