Dear Gareth Owen (Gareth.Owen)1,
Thank you for posting your query in our community.
Your question is how to Stop SharePoint email notifications.
I understand your concern and to my knowledge, I would like to convey that there are two methods you can use to tun off email notifications. Kindly please follow the instructions from the article below.
Appreciate your patience and understanding. Have a great day!!
Best Regards,
Sophia