Upgrade Time: 10:00 Beijing Time on April 8th, 2024
Update Content: Change of IP related to SMTP in Singapore region of Direct Mail service
Upgrade Impact:
The IP of SMTP cluster domain name (smtpdm-ap-southeast-1.aliyun.com) in Singapore region of Alibaba Cloud Direct Mail service changes, and the impact of this upgrade includes:
1. The customers who set fixed IP (set by Direct Mail users) to send emails;
2. Customers who use the domain name to send emails, but the sending service or host does IP cache for domain name resolution;
3. Customers who use the domain name to send emails but the sending host does mandatory domain name host binding or force DNS to resolve to the old IP address (;
4. Customers who still use the old IP ( for sending emails for any other reason;
Due to the above reasons, customers who are still using the old IP address ( to send emails need to change to the new IP address: to avoid affecting the SMTP sending service. For customers who don't know how to switch to a new IP, You can refer to the document: https://www.alibabacloud.com/help/zh/direct-mail/service-exceptions-caused-by-background-ip-update-singapore to solve the problem.
We apologize for the inconvenience caused by this change. If you have any questions, please feel free to send feedback via Alibaba Cloud after-sales service or email to dm-support@alibaba-inc.com.
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