Mandrill API error very useful :/

mandrill.rb

req = Net::HTTP::Post.new('/api/1.0/messages/send.json', initheader = {'Content-Type' =>'application/json'})
req.body = @request.to_json

http = Net::HTTP.new(@uri.host, @uri.port)
http.use_ssl = true
response = http.start {|http| http.request(req) }
puts "Response #{response.code} #{response.message}: #{response.body}"

# => Response 500 Internal Server Error: {"status":"error","code":-100,"name":"GeneralError","message":"An unknown error occurred processing your request.  Please try again later."}