Security experts are warning of deceptive e-mails that claim that Microsoft Outlook needs an update. "The e-mail claims that you have a new message in Microsoft Outlook, but you need to reconfigure your settings (by clicking on the helpful link) in order to read it. Of course, the e-mail is bogus and you're actually in danger of handing over details of your email settings to internet hackers," Graham Cluley of Sophos. The volume of spam used by the malware campaign is impressive. Touchette warned that AppRiver had blocked over one million spam messages from this campaign alone during the campaign's first 12 hours. AppRiver has slightly more than 35,000 customers worldwide.