I fear that changing your email is only short term solution. Ignoring them and throwing them out is the best way in dealing with these kind of emails. The spamfilter I use does not stop all of them. So I spent most of my 'email time' not reading or writing email but throwing spam emails away! That is a completely waste of my time but so far the only way that slighty works. Downside, except for the loss of time, is the fact that sometimes I throw away emails that are not spam...