website email not working after moving from VPS to Alibaba Cloud

I have a php website with SMTP from sendiblue.com
member register at my website will email verification.
after moving to alibaba, email service not working. any idea?


sendinblue smtp port is 587.

Dear seachen,
You could create a ticket in your Alibaba Cloud console and our postsales team will help you with that. Here's the link:
https://www.alibabacloud.com/help/doc-detail/47605.htm?spm=a2c5q.11423531.0.0.7ff01145jyb6Nz#ticket
Thank you.