Once you've added a custom "from" address to Hive (check out this FAQ for more info on choosing a domain: What subdomain should I pick for a custom “from” email address?), you need to add the DNS records from your Email Settings page in Hive to your DNS provider's settings in order to verify your domain.
Here's an example of what the values will look like in Hive:
Here's how to edit the DNS settings of common providers:
- GoDaddy: MX - CNAME - TXT
- Network Solutions: MX - CNAME - TXT
- Rackspace Email &Apps
- Rackspace Cloud DNS
- Amazon Route 53
- Digital Ocean
Once you’ve added the values from Hive to your DNS provider and they’ve propagated, your domain will be verified!