I am receiving spam mail, although it is not addressed to my own email address. It seems to be sent via my ISP. For example, the mail comes addressed to dn@mail..net.au. Quite a lot of the spam mail which I receive is addressed variously to **@mail..net.au. I do not want to ask the sender to delete my name as this will mean sending my own email address to them. Similarly other junk mail has reached me although it is addressed to an email address at a completely different ISP. How can I take my email address off their list?

The reason that you are receiving emails which appear to be addressed to someone else is that the sender is putting your email address in the BCC: section of the email (blind carbon copy). By putting someone as a BCC recipient, means that no one else who receives that email can see your email address (or is even aware that you have been copied the email). What the sender appears to be doing is sending a blind carbon copy (BCC) of the email to every person they wish to send the email to and then putting a bogus email address in the TO field (as the email will still send to all BCC recipients even if the email address in the TO field is a bogus). Unfortunately there is no way to stop this except by possibly making an email filter in Outlook Express which will automatically delete any emails addressed to dn@mail..net.au. You could also try a program such as Mailbox Guard (www.pjwalczak.com/mbguard/) which could help in your fight against spam.