Starting today, I began getting email notifications for each comment made on every post on the site.
I went to preferences, Email to see what this was and I saw a red banner saying
Mailing list mode enabled. Email notification settings are overridden.
This mode causes an email to be sent on every topic when it’s updated.
I noticed another person noticed the same thing and reported it here : Include sliding-sync-proxy with synpase/matrix container - #3 by shunkica