Here is what I do.
I have several Yahoo email accounts.
The reason is, I use them for SPECIFIC puropses.
I.E. One for friends, One for family, One for buissness. and One for ALL other purposes. {advertising on the net and such} The one I use to give as a net refrence I use the yahoo filters on {I find it to be very effective} You can filter keywords in the header, subject and body.
Filter Name
If all of the following rules are true...
From header: {keyword here} match case
To/Cc header: {keyword here} match case
Subject: {keyword here} match case
Body: {keyword here} match case
Then...
Move the message to: TRASH
It takes a while to develop the necessary filters but well worth the time.
AND yahoo mail has the option to mark any email as spam {you will NEVER see mail from that addressee again!}
I do occasionaly get spam in my buissness, friends and family emails, but NOTHING compared to what I get in my net refrence email. And when I do get spam in my b, F & F email I just mark as spam.
I QUIT using I.E. and O.E. for browsing and email altogether!
I found them to be BAD NEWS when it came to privacy and security!
In fact, On my WIN 98 SE machine {The one I primarily use for surfing and email} I even went as far as to DELETE the I.E. and O.E. folders AND I removed the reg refrences from the registry Via REGCLEANER. {I did this so NO ONE else using this machine can inadvertintly Use them.
YES I HATE SPAM as much as anyone on the planet!
B.T.W. DON`T try and delete the I.E. or O.E. folders from XP you won`t like the results! {Don`t ask me how I know

} You can however KILL the .exe`s on them. {so No one can use them} B.T.W. if you decide to disable I.E. or O.E. Download another browser first.
One last thing sence I have rid my P.C. of I.E. and O.E. my viri, trojan, worm problems have virtually dissapered {at least on the win 98 machine} Two of my XP machines have encountered viri, trojan, worm problems recently.
The reason: My wife and kids insist on using I.E. and O.E. *SIGH*