added a general description to the docs

moocode · Sep 4, 2010 · b0b8976 · b0b8976
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 h2. The Ruby Client library for SendHub.net
 
+SendHub is an outbound 'transactional mail' web service.  It means you don't need to maintain your own
+mail servers and you can get callbacks into your application if mail bounces etc..
+
 h2. Setup & Installation
 
 Create an account on "SendHub":http://sendhub.net/ to obtain your API keys