This is not spam, however this is against riseup's rules. Riseup users are not supposed to invite people they don't know personally.
If it is only secure e-mail you need, and you are in an emergency, then I'd recommend protonmail. For less secure needs, I'd recommend openmailbox. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/c6cdaa99-e359-9a88-08d8-a5094a3ad7b4%40gmail.com. For more options, visit https://groups.google.com/d/optout.