Show HN: At-mentions in Gmail Posted by inkwash on Saturday January 24, 2015 @08:52PM from the show-hn dept. http://refapp.co ( 7 comments | 5 points | on HN )
Sadly it doesn't seem to play nice with the "Multiple Inboxes" Gmail lab...
:-(
It looks like it was an issue with the co-TLD, rather than your site though, and it is back now.