Just came across this thread, looked in my gmail spam folder & found a whole lot of Pedelecs emails! Hopefully I've now set a rule to make the forum emails come to my inbox instead.
I don't know how the 'Report as not spam' works.
Rather than making a rule I am using that, hoping that eventually gmail will stop marking these as spam not just for me but for everybody. Maybe one person doing this multiple times has not effect, but if lots of people did it it might eventually come right for everyone, with no need for rule exceptions?
I don't know if it is possible to contact gmail admin to get them to stop the spam marking?
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It looks as if they are currently being marked spam because
Why is this message in spam?
It is similar to messages that were identified as spam in the past.
They were identified as spam in the past because of Russ using his old email that didn't do proper authentication.