Creating an MX Record

An MX (mail exchanger) record maps a domain name to a mail exchanger. A mail exchanger is a server that either delivers or forwards mail. You can specify one or more mail exchangers for a zone, as well as the preference for using each mail exchanger. A standard MX record applies to a particular domain or subdomain.
You can use a wildcard MX record to forward mail to one mail exchanger. For example, you can use a wildcard MX record in the example.com domain to forward mail for eng.example.com and sales.example.com to the same mail exchange, as long as the domain names do not have any matching resource record. Wildcards only apply when the domain name being queried does not match any record.

To create an MX Record, complete the following:

1. From the Infoblox Portal, click Configure > Networking > DNS > Zones.
2. Click the DNS view.
3. Click the zone.
4. Click Create > Record and select MX Record from the drop-down list.

On the Create MX Record page, specify the following and click Save & Close:

• Mail Destination: Enter the mail destination. 
• Select Zone: Select an associated zone from the column selector.
• Mail Exchanger: Enter the mail exchanger. 
• Preference: Enter a preference or select from the drop-down.
• Description: Enter a descriptive comment about the MX Record.
• TTL: Enter a numeric value and select Hours, Minutes, or Seconds from the drop-down.
• Disable for DNS Protocol: Click this check box to temporarily disable for DNS Protocol. 
• Tags: Click Add to associate keys with values. Specify the following details:
  • KEY: Enter a meaningful name for the key, such as a location or a department. 
    
  • VALUE: Enter a value for the key such as San Jose (for location), or Accounts (for department). 
  • To remove a tag, select the respective check box and click Remove to delete the associated tag. For more information about tags, see Managing Tags.