> However, people are generally fine with DMARC or other crowdsourced spam signals, so it's not clearly bad.
DMARC isn't a crowdsourced spam signal. And from my memories chatting with people running mail servers—the crowdsourced spam filtering is fairly controversial.
DMARC isn't a crowdsourced spam signal. And from my memories chatting with people running mail servers—the crowdsourced spam filtering is fairly controversial.