Perhaps you want to add that the remailer is run by Autistici/Inventati? I guess this would make it a bit more trustworthy.

...d that this service is also offered by default to all Riseup and Autistici/Inventati users -- https://help.riseup.net/it/chat and https://www.autistici.org/en/stuff/man_jabber/index.html -- and that

I would add Autistici/Inventati to the list.