How to setup Service Desk Catch-all?

Hi, I have a self-hosted install up and running, and service desk is working with a dedicated G Suite account. Each project is showing a unique address+key as expected.

However – I am actually interested in using the catch-all option. I just don’t know how to get it to work?

In gitlab.rb, when I switch the settings like so:

gitlab_rails[‘incoming_email_enabled’] = true
gitlab_rails[‘incoming_email_address’] = “support@domain.tld”
gitlab_rails[‘incoming_email_email’] = “support@domain.tld”

and then run:

gitlab-ctl reconfigure
gitlab-ctl restart

the Service Desk option disappears / is hidden in our Gitlab config/UI.

How do I complete the setup to use a catch-all email account? And where will those emails be delivered to within Gitlab?