@phlipelder said in Is Spamhaus the DDoS Arm of Microsoft:

@scottalanmiller BTDT

Back in the day the general sentiment was that RBL "services" were no more than extortion rackets. IMNSHO, that has not changed much.

With the advent of SPF, DMARC, and DKIM their relevance will become a lot smaller which is a happy.

SPF has been around forever, but a lot of mail domains still do not have it setup.
DMARC has barely any traction by comparison.
DKIM is not even a thing that does anything. DKIM only tells the receiving server what to do with a message that fails SPF or DMARC, instead of the receiving server deciding for itself.