TBF, not sure if you are using Outlook/Outlook Express, but setting one or two message rules up will sort the crap out.
I used to get loads, never get any now.
Just been on to Orange (probably the best for letting spam through) home page to view my account, 367 messages in the junk box, and 106 unopened.
So now if i open Outlook i will connect with the Orange server and i might get one or two personal emails the rest stay with Orange and get dumped in the "junk box", and then are deleted after seven days.
Most spam that you get will be a corruption of your email address, EG: email@example.com, is your address. As long as the bit after the @ is the same it's coming your way. So, firstname.lastname@example.org, will get to you. If you set a message rule up say if the TO/CC line does not contain "big"- delete from server, you'll never see them. (if you have more than one account you would have to add that word as well, eg, son@, you would add "son" to the list)
If they are using your correct address you can set up a list of words to look for, if any of the words are found in the email, delete from server.
Delete from server is in the "select action box" scroll down to find it.
This link might help Message Rules
Also a search on google for setting Outlook message rules might help also.
Of course, if you're not using Outlook/Outlook Express please disregard the above.