Have you tried putting a test in your CV web page? For example, "I welcome inquiries from prospective students. I get a lot of advertising email, so include the

Have you tried putting a test in your CV web page? For example, "I welcome inquiries from prospective students. I get a lot of advertising email, so include the phrase 'brown M&Ms' in the subject line so I will know you are a real person." That should weed out a lot of the email blast applicants.