16. The method of claim 1 wherein the receiving first activity information for a sender of a first link to at least one recipient comprises: sending of an e-mail including the first link by the sender via a mobile device.
16. The method of claim 1 wherein the receiving first activity information for a sender of a first link to at least one recipient comprises: sending of an e-mail including the first link by the sender via a mobile device. 17. The method of claim 16 wherein the receiving second activity information when a recipient accesses the first link sent by the sender comprises: receiving of the e-mail including the first link by the recipient via a mobile device.