Stop

[Ralf Mardorf]

On Tue, 22 Aug 2017 19:37:14 +0100, Hugh Wooller wrote:
>> To subscribe or unsubscribe via the World Wide Web, visit
>>         https://lists.freebsd.org/mailman/listinfo/freebsd-questions
>> or, via email, send a message with subject or body 'help' to
>>         freebsd-questions-request at freebsd.org

Apart from the wrong command "Stop", don't confuse
"freebsd-questions at freebsd.org" with
"freebsd-questions-request at freebsd.org" . I'm sure somebody subscribed
you against your will, confirmed the subscription using your email
account and chose digest to spam you. You are not alone, this happens
at least once a year for at least one mailing list.

FWIW regarding those basics all mailman mailing lists work in the
same way. To follow the link to unsubscribe, you even don't need to know
a password, you only need to reply to a confirmation mail to
unsubscribe. If you shouldn't receive such an email, check your spam
folders first, and if needed get in contact with
freebsd-questions-owner at freebsd.org .