What's with all the messages from @f38.n261.z1

[Random832]

On Tue, Feb 7, 2017, at 15:08, Michael Torrie wrote:
> Seems like we're getting a bunch of messages on the mailing list that
> appear to be copies of real member posts that are saying they are from
> @f38.n261.z1?  They don't appear to be deliberate impersonations.  Some
> misconfigured server reflecting messages back to the list perhaps?

Looking at it (compared to the original), It has Usenet headers for
comp.lang.python (and a path header indicating an origin at
eternal-september.org), and headers associated with FidoNet and
something called "Prism BBS".