10. A computer product comprising non-transitory computer readable storage medium, the non-transitory computer readable storage medium comprising computer executable instructions, wherein the non-transitory computer readable storage medium comprises instructions to: order email messages received by a first user according to a topic map and an author map, wherein the email messages are ordered in a first area of an email client, the topic map indicative of a frequency of a topic in email messages received or sent by the first user, and the author map comprising connections between the first user and users that have communicated with the first user via the email messages, each connection being assigned a weight based on a frequency of communication between the users associated with the connection; and display a second email message in a second area of the email client in response to selection of a first email message in the first area, wherein the second email message is sent by an author of the first email message to a third user, not sent to the first user, and selection of the second email message comprises: determining a relevance score of the second email message with the first user based on the frequency of a topic of the second email message with respect to the first user and the weight of the author map connection between the author of the second email message and the first user.
11. The computer product of claim 10 , wherein the non-transitory computer readable storage medium further comprises: instructions to verify that the first user has access rights to the second email message prior to the second email message being displayed in the second area, wherein the access rights are determined based on: the second email message sharing a topic with the first email message, and the second email message being sent by a second user that sent the first email message.