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Re:The only safe email is text-only email by Sir_Cmpwn on Tuesday September 12, 2017 @12:56PM (#15228989)
We make incremental change. Adoption starts slow, then some middle players pick it up, one big player grabs it and then it proliferates. I've been working on a mail client for some time and I have plans to write a mail server, and both will have first class, opt-out support for hashcash.
Re:The only safe email is text-only email by tscs37 on Tuesday September 12, 2017 @01:02PM (#15229037)
That sounds like a lovely pipe-dream.

I severely doubt any big player picks it up on grounds of it being cheaper and less energy intensive to simply greylist or blacklist.