Fixed #305 Added smtp check to rakefile (GRN-42) (#313)

* <Added conf check for smtp server>

* <fixed code style>

lib/tasks/configuration.rake

@@ -28,9 +28,28 @@ namespace :conf do
     checksum = Digest::SHA1.hexdigest("getMeetings#{ENV['BIGBLUEBUTTON_SECRET']}")
     test_request("#{ENV['BIGBLUEBUTTON_ENDPOINT']}api/getMeetings?checksum=#{checksum}")
     passed
+
+    # Tests the checksum on the getMeetings api call
+    print "Checking SMTP connection"
+    test_smtp
+    passed
   end
 end
 
+def test_smtp
+  smtp = Net::SMTP.new(ENV['SMTP_SERVER'], ENV['SMTP_PORT'])
+  if ENV['SMTP_STARTTLS_AUTO']
+    smtp.enable_starttls_auto if smtp.respond_to?(:enable_starttls_auto)
+  end
+
+  smtp.start(ENV['SMTP_DOMAIN'], ENV['SMTP_USERNAME'], ENV['SMTP_PASSWORD'],
+    ENV['SMTP_AUTH']) do |s|
+    s.sendmail('test', ENV['SMTP_USERNAME'], 'notifications@example.com')
+  end
+rescue => exc
+  failed("Error connecting to SMTP - #{exc}")
+end
+
 # takes the full URL including the protocol
 def test_request(url)
   uri = URI(url)