omnibus-gitlab sends email to admin@example.com upon rpm installation

I was migrating from source installation to omnibus and notice, that the moment I installed rpm of the omnibus-gitlab, my mail queue got message from the gitlab_email_from email address to admin@example.com.

Prior to installation of the rpm, I had /etc/gitlab/gitlab.rb prepared with correct settings for my system, but nowhere in the gitlab.rb (modified by me, or original) I don't see mention of the admin@example.com.

Sending email out somewhere other than my domain is wrong. This email should be configured same way you configure initial_root_password. There should be initial_root_email, which will be used for installation only.

OS: CentOS 7.1511