There were several free SMIME certificate providers, who would issue you a personal certificate verifying that you control a given email address. Most have shu

There were several free SMIME certificate providers, who would issue you a personal certificate verifying that you control a given email address. Most have shutdown their free products in the past few years, I suspect as a result of having to invest money in their decades-old web applications that no longer function correctly in modern browsers. One remains, but this blog post warns that they practice unsafe private key practices, so I'm inclined to suggest that none do. https://davidroessli.com/logs/2019/09/free-smime-certificates-in-2019/ https://davidroessli.com/logs/2019/09/free-smime-certificate...