certificate issue

I get random windows that pop up telling me it can’t verify my certificate.  I have installed on User and Local Machine and it says import successful, but it continues.  I have double checked my settings.

This occurs on my [email protected] account.

Hello John,

This is unfortunately a server issue when there are problems with the server certificate. For the fix, please contact your mail server provider or you can Connect (if you trust the mail server) and ignore the message.