William B. Lurie wrote:

I don't think I'm on any server that is dependent upon Microsoft.

Message-ID:

That is Microsoft's NNTP server value. You are still posting through
Microsoft's server.

Path:...!TK2MSFTNGP04.phx.gbl

The first node (rightmost one as each peering node gets prepended in
this list) shows the host from which the post originated; i.e., to where
you posted. Again, that's Microsoft's NNTP server.

You are NOT posting here using the NNTP server from Eternal-September.
Did you even define a news account in OE for their NNTP server?

Usenet has been around for 30 years. Microsoft tried to usurp Usenet
back in 2006 and now they are leaving.