Mailing list subscription is DEAD
https://lists.freedesktop.org/mailman/listinfo/systemd-devel exists.
But write one mail to systemd-devel-request@lists.freedesktop.org
for like, I dunno, answering the confirmation mail that came thorugh as part of the subscription process, and you get back
<systemd-devel-request@lists.freedesktop.org>: host
gabe.freedesktop.org[2610:10:20:722:a800:ff:fe36:1795] said: 550 5.1.1
<systemd-devel-request@lists.freedesktop.org>: Recipient address rejected:
User unknown in local recipient table (in reply to RCPT TO command)
Same for xorg-devel.