This is a meta message about discourse settings.
I used to read https://community.letsencrypt.org/ with my mail reader. I do so by checking “Send me an email for every new post (unless I mute the topic or category)” in my preferences.
Today I just notice in bottom of one of these mails :
WARNING: you reached the limit of 100 daily emails. Further email notifications will be suppressed.
Would it be possible to disable this limit (by setting it to 0) or to increase it ?