Yahoo has penned a deal with McAfee to use its SiteAdvisor software to warn users about potentially dangerous websites. The search giant plans to filter out malicious Web sites from its search results using McAfee’s SiteAdvisor software.

The new security feature will place a red exclamation mark next to search links McAfee believes are involved with spam, phishing or the spread of malicious software. The new software is called SearchScan.

The most dangerous websites are simply being removed from search results. Yahoo is also flagging less dangerous offending sites to warn users of specific problems that have been reported from those sites. Example warning messages include “Warning: Unsolicited E-mails” and “Warning: Dangerous Downloads.”

The new search protection features will be available in the U.S., Canada, the United Kingdom, France, Italy, Germany, Australia, New Zealand, and Spain.