no answer is good answer

A natural "take-off" of the classic "no news" proverb, this saying refers to when you receive no response to a potentially-controversial or "explosive" message that you had trepidatiously sent to an individual or business/government establishment sometime earlier; the idea here is that if your missive's recipient actually was able to "swallow" or "digest" your message's content without "going ballistic" and hot-headedly sending either a seethingly-angry response or the cops your way, then this indicates that the ultra-careful/tactful word-choices that you'd employed when originally composing your message must have paid off --- the recipient's very lack of any response is actually a response in itself, in that he is indicating to you that your message did not excessively upset him.