People who speak rechilus usually have some motive in mind which they consider a positive one. The Torah’s view, however, is that unless the motive is clearly constructive, the speaker is doing nothing more than gossipmongering and his words are strictly forbidden.
The most common constructive motive that would permit relating such information is to forewarn a person of someone else’s intent to harm him so that the person can protect himself; to inform a person that someone is presently harming him, so that he can put an end to the situation; or tell a person that someone has already harmed him, so that he can seek restitution for the damage (if it is monetary) or at least prevent any further damage.
