How to change GitLab URL that is received in e-mails


I have just installed GitLab in my own server. That is set using NGINX web server listening on port 8030.

On the other hand, I have Apache listening on port 80 and 443 which is configured to proxy any request from to

It works perfectly, but the problem is when GitLab sends an e-mail, the URL that is included in the mail is So I need to copy it, paste in browser url and change URL to become

Is there a way to make the e-mail include the external URL used to connect to the server?