Bump up your junk mail settings. You should provide at the very least your
version of Microsoft Outlook and type of mail account for anyone to begin to
troubleshoot.
With so little to go on from your post, one solution is to make sure the
server-side anti-spam filter is enabled on your e-mail account. Use the
webmail interface to your e-mail account and check the anti-spam filter
is enabled up on the mail server.