Since yesterday I am suddenly being bombarded with junkmail from a company.

I have received almost 400 copies of the same newsletter from this company in Canada (I think). I didn't ask to receive the newsletter and it is doing my head in!!

I have set Outlook to filter and automatically delete them as they come in but every time I connect to my email account it ties up my machine whilst it is downloading/filtering/deleting all the messages.

How can I put a total block on these messages so that they don't reach my inbox? I have a standard web/email account with UNET.

Get in touch with your ISP and ask them to block them for you.