On 2018-02-08 (08:23 MST), David Jones <djo...@ena.com> wrote:
> But how can you tell the difference based on content then? You can't. Two
> different senders could send the exact same email and one could be spam from
> tricking the recipient to opt-in and another could be ham the recipient
> consciously opted into.
That wasn't the question you asked. Is it spam and how do you mark it as spam
are entirely different question and different issues.
Gehm's Corollary to Clarke's law: Any technology distinguishable from
magic is insufficiently advanced.