I tesed it a few days ago its not. Your better off using an smtp plugin and SES's smtp options. I may look at forking and fixing it at some point.
[nodebb-plugin-temporal-ban] Temporal Ban for NodeBB
Ban from profile till selected date
npm install nodebb-plugin-temporal-ban
Tested to work on 0.7, will try to update on 0.9 launch
Calendar selector on all browsers
Test it on 0.8 and beyond
Ooh, that's neat Definitely a nice addition to the plugin ecosystem!
Looks like this is no longer working as of 0.9.