Non A Member Issue

Good Afternoon from Australia.
A member our President keeps receiving this message, He is not computer savvy, but learning.
I checked Membership Management file and he is still placed as a member. 
Not sure what causes this to appear in his email inbox. 
Please help m to understand his issue.
send a resolution to his email and cc me in. 30jonesbh47@gmail.comNo longer a member? Use the following link/web page if you are no longer a member of this club:
Not A Member   https://4875.toastmastersclubs.org?action=NotAMemberNow&mid=00012334&_=CRlX

That message is based on the 'not a member' setting in your email and contact forms:
support.toastmastersclubs.org/doc/item/reducing-spam

He is probably using an incorrect link to get to your website.
Make sure the link he uses only has your website and nothing after it.

4875.toastmastersclubs.org