Update mail dependency to version 2.2.16
Update mail dependency to version 2.2.16

jasnow/follow-all,jasnow/follow-all,BryanH/follow-all,BryanH/follow-all,codeforamerica/follow-all,codeforamerica/follow-all,jasnow/follow-all,codeforamerica/follow-all,BryanH/follow-all