Email Error pop-ups

How to I stop Email Error pop-ups on Norton Antivirus 2012. I temporarily stopped it adjusting the setting to silent mode.  I had different error messages such as 574,572,etc. Called and has Norton Tech support check my computer for viruses and malware, but they found none.  Is there somethin wrong with my Norton or computer? This happened after I clicked on a spam mail attachment. Norton told me the pop-ups are messages to advise they blocked the mails.  Please any help or answers is appreciated. Thanks