1. A method comprising: identifying an electronic message addressed to a first user and a second user, the electronic message including a first tagged component; determining a set of index data for the first tagged component including an importance indicator associated with the first user and a current download count; generating a user-specific content index for the first user based, at least in part, on the set of index data including the importance indicator; receiving a selection of the first tagged component from the first user based on interaction of the first user with the user-specific content index; and incrementing the current download count in a download record corresponding to the first tagged component to establish a new download count.