This reminds me of Breeze[1] from Basecamp.  That service no longer exists, but it always seemed like a great idea to me.<p>Your landing page design is really nice, too.<p>[1] <a href="https:&#x2F;&#x2F;signalvnoise.com&#x2F;posts&#x2F;3391-launch-basecamp-breeze-the-easiest-way-for-small-groups-to-keep-in-touch-via-email" rel="nofollow">https:&#x2F;&#x2F;signalvnoise.com&#x2F;posts&#x2F;3391-launch-basecamp-breeze-t...</a>