<https://lists.freebsd.org/subscription/freebsd-ports> refers to:
> This mailing list hasn't received yet any mail since its migration,
> in 3 seconds you will be redirected to its mailman's archives
<https://lists.freebsd.org/pipermail/freebsd-ports-announce> is 404, not found.
As far as I can tell, the list does exist; an attempt to subscribe resulted in:
> Hi, this is the Mlmmj program managing the
> <freebsd-ports-announce@…> mailing list.
> You were unable to be subscribed to the list because you are already