Adding email accounts to your iPhone is usually a quick and painless affair. And once done, you can read and respond to all of your email messages from a single integrated inbox.
To get started, round up all of your email usernames and passwords. This might be all you need, but if you have an IMAP account hosted by an email service or a corporate Exchange server, you might need additional information.
How to add a webmail account to your iPhone
1. Start the Settings app.
2. Tap "Passwords and Accounts."
3. Tap "Add Account."
4. Choose the kind of email account you want to add. Popular webmail services like iCloud, Gmail, Yahoo, AOL, and Outlook.com are fairly straightforward. When requested, enter your username or email address, and then add the password.
5. Depending on how much mail is in your inbox, it may take up to a few minutes for your Mail app to update and show all your mail.