Adding an MX Record Set

Scenarios

If you want to map email servers to a domain name, you can add MX record sets.

For details about other types of record sets, see Record Set Types and Configuration Rules.

Prerequisites

You have deployed an email server and obtained its domain name.

Procedure

1. Log in to the management console.
2. In the service list, choose Network > Domain Name Service.

   The DNS console is displayed.

3. In the navigation pane, choose Private Zones.

   The zone list is displayed.

4. Click in the upper left corner and select the desired region and project.
5. Click the zone name.
6. Click Add Record Set.

   The Add Record Set dialog box is displayed.

7. Set required parameters based on Table 1.

   Table 1 Parameters for adding an MX record set

   Parameter	Description	Example Value
   Name	Prefix of the domain name to be resolved. For example, if the zone name is example.com, the domain name prefix can be as follows: www: The domain name is www.example.com, which is usually used for a website. Left blank: The domain name is example.com. In some cases, you may need to set the record set name to the at sign (@). However, the at sign is not supported. Leave the Name blank. abc: The domain name is abc.example.com, a subdomain of example.com. mail: The domain name is mail.example.com, which is typically used for an email server. *: The domain name is *.example.com, which is a wildcard domain name, indicating all subdomains of example.com.	Left blank
   Type	Type of the record set If a message is displayed indicating that the record set you are trying to create exists, the record set conflicts with an existing record set.	MX – Map domains to email servers
   TTL (s)	Cache duration of the record set on a local DNS server, in seconds. The value ranges from 300 to 2147483647, and the default is 300. If your service address changes frequently, set TTL to a smaller value.	The default value is 300s, which is, 5 minutes.
   Value	Email server address You can enter a maximum of 50 record values, each on a separate line. The format is [priority][mail server host name]. Configuration rules: priority: priority for an email server to receive emails. A smaller value indicates a higher priority. mail server host name: domain name provided by the email service provider	10 mailserver.example.com
   Tag	(Optional) Identifier of the record set. Each tag contains a key and a value. You can add a maximum of 10 tags to a record set. This parameter is displayed when you expand More Settings. For details about tag key and value requirements, see Table 2.	example_key1 example_value1
   Description	(Optional) Supplementary information about the record set. You can enter a maximum of 255 characters.	-

   Table 2 Tag key and value requirements

   Parameter	Requirements	Example Value
   Key	Cannot be left blank. Must be unique for each resource. Can contain a maximum of 36 characters. Cannot start or end with a space or contain special characters =*<>\,|/	example_key1
   Value	Cannot be left blank. Can contain a maximum of 43 characters. Cannot start or end with a space or contain special characters =*<>\,|/	example_value1

8. Click OK.
9. Switch back to the Record Sets page.

   View the added record set in the record set list of the zone and ensure that the status of the record set is Normal.