If you're getting a lot of spam in your Business Email account, check the following three things:
Is your email address POP-only?
POP-only email addresses cannot use Yahoo!'s SpamGuard Plus feature, which automatically filters junk mail into your Bulk or Spam folder. This means that you'll get all messages sent to your inbox, even those we suspect as spam.
To fix this, you'll have to delete the email address, then recreate it with Yahoo! and POP access. Learn how.
Is your catch-all activated?
Because a catch-all mailbox collects everything sent to your domain, it can accumulate spam. If you find you're receiving too much junk mail, turn off your catch-all.
Have you accidentally turned off SpamGuard Plus?
If you have an Business Email address associated with a Yahoo! ID, make sure that you haven't deactivated SpamGuard Plus. SpamGuard Plus automatically filters suspected spam to your Spam or Bulk folder, and won't download these messages when you check your email using a desktop email program. To review this setting:
Using the new Mail interface
Sign in to your Business Mail account at http://mail.yourdomain.com (be sure to replace "yourdomain.com" with the domain name associated with your account).
Click "Options" in the upper-right corner of the page, then choose "Mail Options" from the pull-down menu.
On the left side of the page, select the "Spam" option.
On the Spam page, make sure there's a check in front of the "Automatically send suspected spam to my Spam folder" option. This means that SpamGuard is enabled.
Click the "Save Changes" button to save your settings.
Using the classic Mail interface
Sign in to your Business Email account at http://mail.yourdomain.com (be sure to replace "yourdomain.com" with your domain name).
In the upper-right corner of the page, click the "Options" link.
The Mail Options page appears.
Under the Spam topic on the Mail Options page, click the "Spam Protection" link.
In the Spam Filter section of the Spam Protection page, you should see that SpamGuard Plus is on.
If SpamGuard Plus is off, click the "Turn SpamGuard Plus ON" link to turn it on.
Click the "Save Changes" button to save any new settings.
If you still have questions about spam, check out our security resource center.