DO NOT UNSUBSCRIBE whatever you do. this will confirm to the spammers that they have found a live e-mail account. Pop round to see her with this months cover CD from PCA and install Spam pal, its a great little program.
Set it up so that all suspected spam goes into a spam folder. She can have a quick look in there from time to time and and only read the ones that she know. These accounts can then be put into a white list and e-mails from them will be allowed through in future. Any which are obviously spam can be deleted without looking at them. If all e-mails in the folder are obviously spam, just click control and A simultaneously to select all and press delete.