It is normal for you to have the Alibaba.com account email with the suffix of "@privaterelay.appleid.com".
When you create an account on Alibaba.com with apple id, you will be asked to "Share My email" or "Hide My Email, Forward To..." and if you choose “Hide My Email, Forward To...”, the iPhone system will generate a virtual Apple email address with the suffix of "@privaterelay.appleid.com" which is connected to your daily-use email positively and sync to Alibaba.com App to have your account email info.
For more Apple "Hide My Email" official introduction, you can also refer to" https://support.apple.com/en-us/HT210425"