Hi Enjay,
In dealing with many emails a day Spam is a problem everywhere, the best options i have been able to find are as follows

1. Download the latest version of ADAWARE from << http://www.lavasoftusa.com/ >> this is free and is best kept updated weekly.

see below

Ad-aware Standard Edition is THE award winning, free*, multicomponent detection and removal utility that consistently leads the industry in safety, user satisfaction, support and reliability.
With its ability to comprehensively scan your memory, registry, hard, removable and optical drives for known datamining, aggressive advertising, and tracking components, Ad-aware will provide the user with the confidence to surf the Internet knowing that their privacy will remain intact. Let Ad-aware protect your privacy.

in addition to this i have installed << Norton Intrnet security >> you can pick it up for around $130 in most post offices. this has a spam section which when i intalled it was like a breath of fresh air, no more dealing with spam and works well.

Regrds
Pete