1. A computer-executed method for filtering outbound content via inference detection, the method comprising: identifying previously sent content with a common first destination identifier; extracting a set of keywords from the identified previously sent content; issuing a number of Web search queries based on the keywords extracted from the identified content; receiving a number of hits in response to the queries; extracting a set of expected-content keywords from the hits; associating the expected-content keywords with the first destination identifier; receiving a piece of outbound content; determining the number of expected-content keywords present in the outbound content; and producing a result which indicates the destination identifier for the outbound content and at least one expected-content keyword present in the outbound content, thereby allowing a user to determine whether the outbound content has the proper content and destination identifier.