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How to block an address for Mail Classic:

1. Click Options in the upper-right corner of your Yahoo! Mail page.

2. From the list on the left, click Spam.

3. In the middle of this page, in the space provided in the "Blocked Addresses" section, enter the email address from which you don't want to receive mail.

4. Click Add.

5. Click "save changes" at the top of the page.

6. The address now appears on your list of blocked addresses.

You may block up to 500 email addresses. You can see how many of your blocked addresses you're using beside the list - for example, 4 of 500 used.

For the updated version:

1. Select Options | Mail Options.

2. In the left pane, select Blocked Addresses.

3. In the Add an address field, type the email address which you want to block.◦

4. Click the "+" button at the right of the list.

Go to mail options, and advanced options and blocked addresses. Add the email in there to block it.

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