An interruption makes me slow

From: Mathews (anonymous_at_discussions.microsoft.com)
Date: 05/31/04 

Date: Mon, 31 May 2004 00:17:21 -0700

When ever I open my email messages a web named symantec,
shows scanning messages and trying or sending so many
mails through my internet.They pick up addresses from my
folder. I am afraid this is misusing my mail ID or make
use of my system. This causing much delay and
inturrupting my activities in the network. Please help?