Having worked on the email side of things, the problems mentioned here are exactly as painful there as it is for HTTP. The problem with the robustness principl

Having worked on the email side of things, the problems mentioned here are exactly as painful there as it is for HTTP. The problem with the robustness principle is that it is heavily misinterpreted in practice. The original intent was to remind implementors to be wary of ambiguity in specifications, but in practice, it has often been taken to mean that implementors must try to scavenge as much understanding as possible from flagrant violations of the specification.