What is the sensorship rules of this community?

If you have more than one mail account, notifications go to the one you use to sign in here. That will usually be the address associated with your Apple account/Apple ID.

If you respond to a post whose author made a Terms of Use violation causing the entire thread to be removed, the author gets the email, not you.

Hecnil wrote:

My posts were removed without any notification, therefore I want to know why.

You will receive an email stating why.

The reason is likely in the TOU:

Apple Support Communities Use Agreement - Apple Community