I can not open mail or safari code -1712 is the problem?

http://www.inmotionhosting.com/support/email/email-troubleshooting/mail-cant-ver ify-the-identity-of

from the google

https://www.google.dk/search?client=opera&q=mac+mail+code+-1713+error&sourceid=o pera&ie=utf-8&oe=utf-8&channel=suggest

Restart. If an application won't quit and prevents restarting, force quit. As a last resort, force a shutdown by holding down the power button for a few seconds. Then press it again briefly to start up. Test.