Notification mails are not received
We are using GitLab Community Edition 11.8.0. Notification mails are not received by any of the project members of a project on https://gitlab.gtd.eu
The email notifications are not received even activating ‘watch’ for the specific project (no notifications for issue creation, delations, comments, …). I have also played with different notification configurations but no notifications are received at all. I have also tried to activate the push notifications and make a push, and nothing.
Do you have any idea of what could be happening?