On Fri, 16 Oct 2020, Andrew Hume wrote:

> can stanley lieber contact me please (regarding an 8th edition manual)? 
> i can’t contact you via sl@stanleylieber.com (because of an SPF error), 
> so perhaps via another email address.

SPF is utterly broken as an anti-spam measure.

-- Dave, the artist formerly known as "Zick"