Thread:Silvonch/@comment-22439-20150422173811/@comment-26335993-20150422181332

Afrter editing a page I got this message: "This action has been automatically identified as harmful, and therefore disallowed. If you believe your edit was constructive, please inform an administrator of what you were trying to do. A brief description of the abuse rule which your action matched is: Prevent non-autoconfirmed users from adding an external link"

What does it mean?