- Settings -
Open the Settings app and scroll down to Mail, Contacts, Calendars, and select that option. Choose the mail account you want to change.
- Choose Account -
On this next screen, again, choose your email account.
- SMTP -
Choose SMTP.
- Select Server -
Select your SMTP server needing changed.
- Make Changes -
You are now on the settings screen where you can make your adjustments.