Blame your ISP, or hosting provider. As an email admin, I deal every-single-day with phishing and malware that comes through email. There is not a single hostin

Blame your ISP, or hosting provider. As an email admin, I deal every-single-day with phishing and malware that comes through email. There is not a single hosting company that does anything more than pass complaints onto the spammer - thus verifying that I'm a good target and causing even more of a problem. While I do not use any blacklists, I do make my own. I've found that blocking individual IPs is useless, there is always another one. However, if I block the entire IP range I have much more success. This is your hosting company's fault for allowing spamming and doing nothing about it.