> By default, the client already expects the server to fulfill a gatekeeping role in filtering (censoring!) spam. This is how a lot of email clients currently

> By default, the client already expects the server to fulfill a gatekeeping role in filtering (censoring!) spam. This is how a lot of email clients currently work, but it is not a fundamental law of the universe. Back in the day, you could run programs on your computer that would filter spam automatically based on criteria and examples you specified. For example, see https://daringfireball.net/2003/09/interview_michael_tsai https://daringfireball.net/2003/09/interview_michael_tsai The fact that people would pay money for such a program highlights the difference between spam filtering and censorship: spam filtering hides things that I don't want to see, while censorship hides things that other people don't want me to see.