First, follow the instructions for getting a custom domain set up with NationBuilder. Let us know that you'll be using Google Apps so we can properly configure the domain settings.

After your custom domain URL is live, apply for a Google Apps account. You can start the process for a free account - with up to 10 users and custom email addresses - here.

Early in the setup process, Google will ask you to verify site ownership. Click on the "Alternate Methods" tab, and choose the "Add a meta tag" option.

Copy the verification code - it will be bracketed by questions marks. You need just the code, not the whole HTML snippet.

Go to your NationBuilder control panel and click Pages > Settings > Analytics set up, and paste the verification code in the field marked "Google site verification key."

Return to the Google Apps setup and click "verify." Note that it can take 30-60 minutes before the verification code is recognized by Google.

If you've already set up a custom domain and want to add Google Apps with Gmail, just shoot us an email and we'll be happy to adjust the settings to optimize your email capabilities.