def send(options)
      response = EmailDirect.post "/RelaySends/#{category_id}", :body => options.to_json
      Hashie::Mash.new(response)
    end
def send(options)
      response = EmailDirect.post "/RelaySends/#{category_id}", :body => options.to_json
      Hashie::Mash.new(response)
    end
Sends a custom message.  See the docs for all the possible options
 @see https://docs.emaildirect.com/#RelaySendCustomEmail