Usually I’m critical of my Internet service provider when I can’t do what I want to do. In this case I was trying to forward email spam to a spam-reporting service. Charter Internet, who is my provider, blocked my sending the email, saying it was spam.
A lot of email spam comes from home computers, connected to high-speed Internet services, that have been compromised (hacked, pwned) by spammers. What Charter appears to be doing is blocking that illicit activity. This is the kind of corporate responsibility I applaud.
What was a bit curious, however, is that Charter figured out that the email was spam. It was so deeply obscured that my own spam filter, including a well-trained naive Bayesian classifier, didn’t catch it.