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Which anti-spam technologies currently exempt mails with hashcash postage?

April 26, 2017anti-spam Currently exempt hashcash mails postage technologies

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Which anti-spam technologies currently exempt mails with hashcash postage?

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Hashcash is supported in SpamAssassin as of version 2.70. SpamAssassin is a popular user and ISP anti-spam tool to add hashcash support. SpamAssassin supports keyword filtering (and other techniques) to weed out spam. If you look in your mail headers for X-Spam-Checker-Version: SpamAssassin then mail you receive is being examined by SpamAssassin. Hashcash is also supported by TMDA and CAMRAM. This means by sending hashcash on your mails you can virtually eliminate your chances of getting a false positive and hence of the mail you send not getting delivered, or getting delivered into a junk folder where the receiving ISP or user is using SpamAssassin, TMDA or CAMRAM. The number of hashcash supporting systems is growing.