Hello,

It is possible your system is infected. Spam is often sent from botnets of compromised computers. If large numbers of the errors listed above are appearing I suggest you treat this as an infection.

Many Unexpected Pop-Ups from Symantec Email Proxy are Displayed

http://www.symantec.com/business/support/index?pag...

Is your system infected? Symantec tools to help clear an infection

https://www-secure.symantec.com/connect/forums/you...

Moving this thread to the Endpoint Protection forum.