One of several new features in Windows Live Messenger 9.0 will have a new security feature to report users who send unsolicited messages, known as SPIM (spam over IM).

After compiling a list of IM contacts, hackers try to trick users into clicking links. Those links can often launch an unwanted installation of spyware or other malware via a browser vulnerability or other security hole.

Liveside published other new details of Messenger 9.0 on Wednesday but then deleted the post on Thursday. It wasn't entirely clear why the site decided to delete the post, but it could be retrieved via Google's cache.