How to Find SSL on iPhone
By using SSL, or Secure Sockets Layer, when sending e-mail with your Apple iPhone, you will have a layer of security that isn’t present when using e-mail without the feature. SSL, which encrypts your e-mail and password, is available on most major e-mail services, so it’s a good idea to enable it if it is indeed available on the service you use. The iPhone does not turn on SSL by default, so you should become familiar with its location on the phone so you can enable it for your e-mail accounts.
Things You'll Need
Click the “Settings” icon on the home screen.
Scroll down to the “Mail, Contacts, Calendars” entry and tap it.
Tap one of your e-mail accounts under “Accounts.”
Scroll down to “Advanced” and tap it.
Find “Use SSL” under “Incoming Settings.” Slide the selection to “ON” to enable SSL for that account.