US Patent 9967268 Identifying e-mail security threats

One or more processors receive, from one or more social-network sources, social-network data that identifies at least one potentially malicious source accessing a plurality of social-network profiles for a group of users. The one or more processors receive, from one or more e-mail servers, e-mail data associated with a plurality of e-mail messages received by the group of users. The one or more processors determine, based on the social-network data and the e-mail data, that an e-mail message of the plurality of e-mail messages is from the at least one potentially malicious source. The one or more processors output information identifying the e-mail message as being from the potentially malicious source.