spam learning filters - any use?

[#1]

I dutifully report each unrecognised spam back to spam@despamchecker.plus.com at plusnet. It is a pain as the freeware "fastforward" does not work on my machine. Over the last few weeks there has been an upsurge in spam. Am I wasting my time?

[#2]

Hi there,
You're certainly not wasting your time.
In the lead up to Christmas, there is always a considerable increase in spam every year, which is probably what you are seeing.
Have you considered joining the Postini trai?

[#3]

Thanks for that. Do they have to be forwarded as separate messages, or can I send on a single email as attachments?