From the home screen, tap Settings.
Scroll to and tap Mail, Contacts, Calendars.
Tap the preferred account.
The Incoming Mail Server and Outgoing Mail Server are now displayed.
To view the incoming port, scroll to and tap Advanced.
Scroll down to Incoming Settings.
The incoming server port is displayed next to Server Port.
To view the outgoing server port, tap Account.
Tap Primary Server.
The outgoing port is displayed next to Server Port.
The email settings have been displayed.