CommerceTeam Linden has announced on the SL Forums on 5th February 2013 that on the SL Marketplace there is new email preferences support apparently. The main addition is that you can now turn emails on and off under email settings which is rather neat and handy I think. Check out the release notes for 5th February 2013 for details.
Marketplace now supports the ability to set email preferences. You will now be able to turn emails on or off. In addition, new emails have been added and work has been done on stability to prevent delays in email delivery. Please see the Release Notes or the Knowledge Base articles for Merchants or Shoppers for more information.
This is very useful and worth checking out. 🙂