On 11 Oct 2017, at 6:31, John Stephenson wrote:
FWIW, maybe 5 years ago, we were required to send a legally mandated
bulk
email (deserving of delivery) and when reaching out to various inbox
providers, my contact at yahoo suggested that I send this effort
through an
existing domain, but a unique selector. They didn't indicate exactly
what
this would do, but it does indicate that they are making use of the
selector beyond it's original intended use, as Benjamin notes above.
To stress that, on this day and age, it's naïve to think that
_anything_ put on an email, header or body, doesn't matter.
Best regards
-lem
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