How can I know who sent the anonymous message in QQ space?

If it refers to the "message board" in QQ space, you can't leave messages anonymously. You can only leave messages privately (visible only to yourself and the other party), and you need to turn on the yellow diamond. The methods are as follows:

1. Open your friend's QQ space and click "message board".

2. After entering the message content, check "Private Message" before sending it.

If it refers to the "blog" comments and messages in QQ space, the other party may have used the space prop "Invisible Grass". After using it, the commenter can display anonymity, and no one can see the real identity of the user. However, using the magic mirror prop can remove the effect of this prop, and one of the props can only be used once.

Invisible Grass can be used when commenting on the blog. When commenting on the blog, select "Anonymous Comment (Invisible Grass)" and publish it successfully.

Note: Invisible Grass Prop is not supported for giving to friends, but only for your own use. Using this Prop only affects that others can't see your nickname when commenting, and does not affect other information.