in reactive application , i have to sent email at scheduled time, explain and give me some tips to implement this logic

HI Aadhik,

To send email from your reactive application you need to develop  Traditional Web application to have access to the email functionality and consume it in your Reactive app. You will not get option to create Traditional web module in your reactive application and hence you have to create it separately and than take its reference in your reactive app.

 Also in order to send them on schedule time you can create Timers in your react application and schedule them accordingly.