Resolve mailbox domain name resolution conflicts

1. Preparations

1.1 If your domain name service provider (SP) is Alibaba Cloud, log on to Alibaba Cloud DNS. In the list of domain names, select your mailbox domain name and click DNS Settings to open the DNS Settings page, as shown in the following figure:

1.2 If your domain name was not purchased from Alibaba Cloud, go to your domain name provider's management page. The location for adding DNS records varies by provider but is usually in a section named 'Domain Name Resolution' under 'Domain Management'. If you cannot find this section, contact your domain name provider for help. You can also send this document to your provider for assistance with the configuration. For more information, see How do I configure DNS records for an Alibaba Mail domain name that is not hosted on Alibaba Cloud?.

2. Perform the repair operations

2.1 Check the MX records where the host is @ and delete non-Alibaba Mail MX configurations

In this step, check whether the MX records for the @ host are correctly configured for Alibaba Mail.

The correct MX record values for Alibaba Mail are shown in the following table. If you use Alibaba Mail Standard Edition or Premium Edition, use the following configuration for improved speed and service stability:

If you use Alibaba Mail Enterprise Edition, use the following configuration:

MX records that do not belong to Alibaba Mail cause emails to be delivered to the wrong address. As a result, you may not receive some emails in your Alibaba Mail mailbox. On the DNS Settings page, if any non-Alibaba Mail DNS records exist where the host is @ and the type is MX, click Delete, as shown in the following figure.

Note: You can navigate to previous pages. Ensure that all non-Alibaba Mail MX records are deleted.

2.2 Delete CNAME records where the host is @

On the DNS Settings page, check for CNAME records where the host is @. If any such records exist, delete them. Otherwise, you can skip this step.

A conflict between a canonical name (CNAME) record and an MX record prevents senders from finding the DNS records for your mailbox. As a result, some emails are not delivered to your Alibaba Mail mailbox.

2.3 Example of correct DNS records where the host is @

After you complete the previous two steps, check the DNS Settings page to verify that all DNS records for the @ host are configured correctly. The following is an example of a correct configuration. If you use Alibaba Mail Standard Edition or Premium Edition, your configuration should match the following example:

If you use Alibaba Mail Enterprise Edition, your configuration should match the following example:

3. Wait for the changes to take effect

Changes to DNS records typically take effect in 1 to 2 hours, but can take up to 48 hours to fully propagate. After you configure the DNS records, wait for this period to pass. The issue of not receiving emails should then be resolved.