Add DNS records to verify your domain name
If your Alibaba Mail mailbox cannot send or receive emails, add or correct the DNS MX records for your domain name.
Mailbox alert: Your mailbox cannot send or receive emails due to a system configuration issue. Contact your administrator to configure DNS resolution.

The DNS MX record for your domain name is incorrectly configured, which prevents your mailbox from sending or receiving emails. Possible reasons:
1. Your domain name may have expired, causing DNS resolution to fail. Contact your domain administrator to verify the domain validity in the domain provider's console.
2. The DNS MX record is incorrect. Contact your mailbox administrator to add the correct MX record in your domain provider's console.
DNS resolution setup guides
How to set up DNS resolution for an Alibaba Cloud domain name for Alibaba Mail
How to set up DNS resolution for a non-Alibaba Cloud domain name for Alibaba Mail