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On Apr 26, 2016 4:02 AM, "Paul Moore" <p.f.moore@gmail.com> wrote:
\>
\> On 25 April 2016 at 23:55, Franklin? Lee <leewangzhong+python@gmail.com> wrote:
\> > FWIW, Gmail's policies require:
\> \[...\]
\> > That link is currently the only obvious way to unsubscribe.
\>
\> I'm not sure why gmail's policies should apply to this list.

They're Gmail's policies on how not to get your messages filtered by Gmail as spam.

I am not clear on whether they're descriptive (i.e. users will mark you as spam) or prescriptive (i.e. Google's algorithms will determine that you're spam).