taking advantage of tmails destinations method to produce clean array…

… of recipients

lib/pony.rb

@@ -99,7 +99,7 @@ def self.transport_via_smtp(tmail, options={:smtp => {}})
 		else
 			smtp.start(o[:domain])
 		end
-		smtp.send_message tmail.to_s, tmail.from, [ tmail.to, tmail.cc, tmail.bcc ].select { |i| i != '' }
+		smtp.send_message tmail.to_s, tmail.from, tmail.destinations
 		smtp.finish
 	end
 end