Space has been discontinued, but the mailing list mirroring continues to send me emails (today about Education List in https://discuss-space.wmflabs.org/t/wikimedia-education-supporting-learning-during-covid-19/3363 ).
Elena had looked into this.
Our aim is to keep the summary emails (because About Wikimedia Space remains open and registered users might be interested about updates) but avoid that the mailing lists make it there (so if there is no activity in About Wikimedia Space then there are no summaries with mailing lists only).
In any case, users can unsubscribe from these emails in their preferences.
I had suppressed the mailing lists from showing up in the digest but missed Education. That list is now also suppressed. Frequency of digests is default once per week, but maybe we should set it to less frequent.
Note that blog posts will also still show up in digests.