One thing I noticed is that most mailing lists now have a header that identifies them with a specific ID. When I click "Make rule from this email" in Fastmail the primary option is to sort it by that header, not by the sender or receiver. That way only the marketing emails get redirected and not transactional ones from the same sender.
List-Id: A Structured Field and Namespace for the Identification of Mailing Lists
One thing I noticed is that most mailing lists now have a header that identifies them with a specific ID. When I click "Make rule from this email" in Fastmail the primary option is to sort it by that header, not by the sender or receiver. That way only the marketing emails get redirected and not transactional ones from the same sender.
List-Id: A Structured Field and Namespace for the Identification of Mailing Lists
https://www.ietf.org/rfc/rfc2919.txt