O/S Upgrade Affecting Email

My Z30 received the O/S upgrade to 10.3.3.1463 earlier today. After the upgrade, when sending or deleting emails, I was getting this message:

Provider Identity Not Verifiable.
This email provider may not be trustworthy. Personal information may not be protected.

When I click on the Details, 'Entrust Root Certification' is highlighted in blue.I click on it and get the following:
Subject Common Name Entrust Root Certification - G2.
Subject Organization Entrust, Inc.
Subject String US
And a lot more blah blah.

My Internet provider advised me to delete and re-create my email accounts. I get as far as the 'Edit Account' screen and I put my name in the 'Your Name' field. When I click Done, it says 'Saving and verifying your email settings'. After that, I get the same message I was getting prior to deleting the accounts from my BlackBerry. I am no longer able to add any of my email addresses to my BlackBerry.

Can anyone help me re-load my email?

Thanks,

Deb

I called my service provider again and the problem is resolved. If my post can be deleted, please delete it. I can't find any option to do that.