Norton rates complete domains as threatfull, because of 1 malicious site.
webmail.maastrichtuniversity.nl is safe, but because
http://learningandworking.maastrichtuniversity.nl/ was unsafe for a while (has now been removed completely) all sites in domain maastrichtuniversity.nl get a false positive threat report. So Nortons Algoritm is not suitable for large domains.
Does Norton want me to advise my 50.000 webmail users to disable Nortons software?