In your iOS device, head to Settings > Mail.
1. On Mail, tap Accounts.
2. Let’s head to Add Account.
3. Under the Mail Section, tap Add Mail Account.
4. Pick the Other account type.
5. Fill out your email settings and tap Next. The app will try to verify your account automatically. If successful, tap Done.
6. If unsuccessful, select IMAP type and fill out the configuration settings manually. Should it be correct, tap Next.
7. Choose if you’d like to activate Notes for this account, and tap Save to finish the setup wizard.