System wide settings or email settings do not contain how to change domain to something.com instead of 127.0.0.1
Check your config.php, values host_name and site_url
Check also if they happen to be redefined in your config_overrride.php
i hoped they would be in the actual config interface
They are, but during installation only.
i dont remember seeing anything like that
URL of SuiteCRM Instance on Step 2 of the configuration wizard of the installer.