Domain Association
The Domain Association section that appears when configuring a protected domain lets you configure associated domains. An associated domain uses the settings of the protected domain or subdomain with which it is associated.
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Domain associations can be useful for saving time when you have multiple domains, and you would otherwise need to configure multiple protected domains with identical settings.
For example, if you have one SMTP server handling email for ten domains, you could:
• Create ten separate protected domains and configure each with identical settings.
• Create one protected domain and list the nine other domains as domain associations.
The advantage of using the second method is that you do not have to repeatedly configure the same things when creating or modifying the protected domains. This saves time and reduces chances for error. Changes to one protected domain automatically apply to all of its associated domains.
Associated domains do not re-use DKIM keys and signing settings. Domain keys are by nature tied to the exact protected domain only, and cannot be used for any other protected domain, including associated domains.
The maximum number of domain associations that you can create is separate from the maximum number of protected domains.
To configure domain associations
1. Go to Mail Settings > Domains > Domains.
2. Click New to create a protected domain or double-click a domain to modify it.
3. Click the arrow to expand Domain Association.
4. To create a domain association, in the small text box enter the fully qualified domain name (FQDN) of a mail domain that will use the same settings as the same protected domain
5. Click Create.
The name of the associated domain appears in the Members area.
6. Repeat the previous steps for all domains that you want to associate with this protected domain.
7. When done, click Create or OK.