I believe it's high time for assuming "negative
accreditation" and asking questions later.
At this point internet email appears to be about 80% spam.
I get about 1000 spam a day and about 200 legit emails
of which perhaps 40 are sent directly to me rather than
via mailing lists.
The meaning I am attempting to attach to accreditation
is that it is a statement provided by a third party.
But I would ceetainly accept that we need to change the
equation, assume all email guilty until proven innocent.
Phill