The "Mail" app is "built-in" to iOS. You need to go into Apple's "Settings" app and make sure that you have at least one email account and that it is able to send email. After you set it up, launch the Mail app
Agoc Traveland make sure you can send an email.
I can see the settings but I am not able to send the email. It is very urgent to send it. Can you please help me in this. I am looking for your reply.