how do I get rid of all yahoo mail got over 4000?

If you want to mass delete mail you have to be using full featured mail. Basic Mail only lets you do a page at a time. Switch to full featured by clicking on the link at the top right of the Basic Mail page and then you can delete as many as you like at one time. Check the box at the top left of the message list to select all and then hit delete.

DELETE EMAIL

Only the Trash and Spam folders have an icon to delete everything. Hover over the folder and click the trash can that appears.

NOTE: Closing and then reactivating your account may delete everything but I do not recommend it unless you are desperate. Other problems may occur or it may not even work.

FULL FEATURED EMAIL

Delete a single email from your message list.

1. Select the checkbox next to the message.

2. Click Delete.

OR

1. Click the email to view it.

2. Click Delete.

Deleting multiple emails in a list

1. Select the checkbox next to the emails you want to delete.

2. Click Delete.

Deleting a range of emails in a list

1. Select the checkbox next to the first email you want to delete.

2. Shift select the checkbox next to the last email you want to delete.

2. Click Delete.

Deleting all email in a list

1. Scroll your email messages to load more than the initial 50 messages.

2. Select the checkbox at the top of your message list.

3. Click Delete.

NOTE: Not scrolling down will select the first 50 instead of all.

Deleting an email without opening it.

In your message list:

1. Mouse over an email.

2. Click the Trash icon that appears on that email.

Moving emails from your Trash

1. Click Trash in the Left Navigation column.

2. Select the checkbox next to the email(s) you want to move from your Trash folder.

3. Click Move.

4. Click a folder's name in the drop-down list.

Your emails move from your Trash to the selected folder.

BASIC EMAIL

Delete a single message

1. Open an email or select its checkbox.

2. Click Delete.

You can also click the Trash icon at the far right of the message to delete it.

Delete multiple emails in a list

When viewing a list of emails:

1. Select the check boxes of the emails you want to delete.

2. Click Delete.