Like I said, things have changed since 1996.
Indeed they have. Email is much less reliable now than it was then.
Agreed. But it's not the DNSBLs, it's all the other stuff, notably
heuristic content filters, that we have to do to deal with the 95% of mail
that is spam these days.
I track what happens to the mail going out of my system, and the only time
in recent history that any of it got blocked by significant* DNSBLs was
when someone found a bug in my submit server and sent several thousand
spams through it. Oops. I can't really blame people for not taking my
mail until I'd shown that I'd fixed it.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
"I dropped the toothpaste", said Tom, crestfallenly.
* - i.e., ones used by a perceptible number of recipients
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