To use your site in with multiple domains, you've need to set multiple Google API key for each domain.
You can do this at the configuration of the plugin. Go to Mambots, submenu Site Mambot and click on Google Maps. Then you can enter the Google Multi API key. Enter it as <website>;<key>.
Website should be without http:// for example tech.reumer.net Each combination should be on a new line.
Google Maps 
