JS Email Application

I want to design a web email application using backendless. what is best practice to do this in backendless?

the app should have all the capabilities of regular email application like gmail. Is it a good idea to use backendless for this purpose?

Do you have a list of requirements for the server-side? It would be easier to answer your question by looking at the specific things the server should be able to do…

Regards,
Mark

I wanted server act like mail server but I think I should use Email api using another mail server.