1. A method for managing information relating to electronic messages, comprising the steps of: obtaining, from a first source, a first set of data describing characteristics of one or more message senders, wherein each of the one or more message senders has sent one or more electronic messages; determining message volume information that describes the messages sent by the one or more message senders for a period of time based, at least in part, on the first set of data; and predicting whether a particular message sent by a particular message sender, of the one or more message senders, is unsolicited based on, at least in part, the message volume information.