.@ThorstenSuckow showed us his mail client that makes use of #ExtJS as well. Very relevant. Get his presentation: http://t.co/u1ED7Ml5GC
The Best Open Source Email & Collaboration Software
The de-stubbing feature, crucial to the transparent and seamless integration with the personal mail store, is only available and supported in licensed Zarafa Archiver installations, in addition to the multiserver feature that is enabled.