9 Ways To Set The Outgoing Mail Server On An Iphone

This button will be called Mail, Contacts, Calendars in iOS 9 and earlier.

The username and password will be the same as those tied to your account. If you do not know the host name, then you will need to look it up or find it out from the provider. It is worthwhile to learn the SMTP port, as well, since some internet service providers may block the default one.