Rene Luria <opera...@infomaniak.ch> wrote:

> As a conclusion, if you care enough for your customers, you _should_
> publish accurate SPF records for their (your) domains, whether you use
> SPF in your filtering techniques or not.

But doing so increases the likelihood of SPF being perceived as
"widely implemented among reasonable ISPs" and hence being a
reasonable thing for base filtering on. Given how broken SPF is
by design, that is definitely not a good side effect.

IMO it's more reasonable to use *only* DKIM and encourage others
to do the same.

Greetings,
Norbert


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