Many thanks for all the advice folks--Mudcatters rule! I'll sit down with the librarian tomorrow and we'll go through the suggestions.
In reply to s.o.'s query, I'm located in Dublin, Ireland.
I used to use the Outlook rules on my home PC but stopped for some reason (not directly related to spam). I must admit I do like to keep track of the kind of spam--the year before last it was lots of Nigerian-type scams, but they've fallen off in favour of health/medicine related stuff and investment opportunities etc (as if I had any money!).
Just as an aside, the mother of a friend of mine (in the US), a retired sensible teacher, got taken in by a phish email relating to a lottery emanating from Jamaica, got in contact by phone, and ended up sending thousands of dollars to some guy there, much to the horror of her family when they found she had delved deep into her life savings in the hope of winning millions. Even after they confiscated her cheque book she kept trying to find ways of sending money. Unbelievable but true.