The mailing list for listmasters using Sympa

["Mail administrator, Otto Makela" <address@concealed>]

I've gotten Sympa to work pretty well under RHEL 8, except for one
rather critical thing: our corporate-wide single sign-on, implemented
via Shibboleth.

My problem is, RHEL 8 comes with shibboleth-3.2.3-3.1 which I've
configured and tested to work with the httpd I have on the machine.
However, when I try to use Shibboleth with Sympa, it seems Sympa
does not react properly to the authentication process resposes,
and the result is that Sympa gives the error popup

INTERNAL SERVER ERROR (sso_login) - Failed to get your email
address from the authentication service.

All the Sympa/Shibboleth documentation seem to be from quite many
years ago, when Shibboleth was version 2. Just to avoid getting
committed to an insane asylum later on, does Sympa properly
understand Shibboleth3? Does someone here currently use it?

--
address@concealed (Mail Administrator, Otto J. Makela)