On Mon 05 Feb 2018 at 12:53:36 -0500, Greg Wooledge wrote: > On Mon, Feb 05, 2018 at 05:31:29PM +0000, Brian wrote: > > AfAIK. there isn't any way to determine whether a message posted to > > -user is from a non-subscriber. > > I believe some people are using the one of the X-Spam* headers > and looking for the LDOSUBSCRIBER substring. Which is extremely > non-obvious, and probably not a vector that ordinary users can > easily pursue.
The presence of LDOSUBSCRIBER indicates the post is from a subscribed member. It absence tells you nothing about whether the person (as indicted by the From: header) is subscribed or not. -- Brian.
