ZOHO is very nice app and website to develop your own email address of your domain, it provide 15 user free on your free service, I currently using this for my domain . Service and support of this is very nice and lot of youtube videos are also helpful for this . All information are in depth and very helpful to you. Content timeliness is according to your package and very simple design so this is very simple to use and loding time is not much so highly recommend to startups.