– Make sure that the “Fetch New Data” option is activated on your iPhone. To confirm this, tap the “Settings” icon on the home-screen of your phone. Find and tap the “Mail, Contacts, Calendars” tab. Tap the “Fetch New Data” to check if it is switched on. If it is off, swipe your finger across the tab to turn it on.
– You will need an active internet connection to access your email accounts.

– Image Courtesy: engadget.com