No email notifications

I don’t get email notifications when someone opens a ticket in my public project or writes a comment. I have searched through the settings several times now and should actually be notified of any activity via email. Unfortunately nothing arrives.

The mail address is correct - I do get mails to this address from GitLab - e.g. last time I governed myself in this forum or when I forgot my password. But nothing comes from the project.

With a “free” project there is unfortunately no suport - what else can I do?