Wouldn't that be interesting -- you can't join NANOG unless your email domain publishes an SPF record with a -all rule.
That would raise the bar AND prevent the kind of thing that happened this weekend. On Tue, 27 Oct 2015, Geoffrey Keating wrote:
... and thus a suitable topic for NANOG, I guess, rather than a mail abuse list, because it's best use is for domains that send no mail and recieve no mail and don't want anything to do with mail and stil get spam complaints.
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