Here is your first Forum » How to block spam on Yahoo! Mail

Today, yhhelp.net will show you how to mark and delete spam emails in Yahoo Mail, as well as how to block spam email addresses on mobile phones.
1 Open Yahoo Mail. Touch the Yahoo Mail application icon, like a white envelope on a purple background. This will open your Yahoo mail box if you are signed in to your Yahoo account.
If you are not logged in, enter your email address and password.
If you have multiple login accounts, you may have to select an account before proceeding.
2 Select spam email. Touch and hold a spam email until a checkmark appears to the right of the email, then click on any email you want to mark as spam.
Only with these simple actions, will you delete the spam mail from Yahoo !. Your email. Also, if you are interested in 2-step verification in Yahoo Mail or Change Yahoo Mail please visit our blog.
3 Touch ⋯. It is located in the bottom right corner of the screen. A pop up menu will appear.
4 Touch Mark as spam. You will see this option at the top of the popup menu. Selected emails will be moved to the Spam folder.
5 Touch ☰. It is in the top left corner of the screen. A menu will appear.
6 Scroll down and touch the trash can icon next to Spam. You'll see this option in the middle of the menu.
7 Press OK when prompted. This will delete the contents of the Spam folder.
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