Suggest you just add to Blocked Sender list by right clicking on an email and selecting appropriate option. Not sure if this will delete from the server before it downloads the email though - never tried it myself. Good luck anyway.
iPhone X review
Political cartoons in 2017: Chris Riddell, Rebecca Hendin and Dave Brown on what it’s like to…
The best iPhone for 2017
Tennis : comment regarder la finale de la Coupe Davis 2017 ?