gmail labs released a very useful faeture which prevent you from sending mail which you will regret later. its very good services released by google lab . just imagine you send e-mail to your boss and threatening that your are quit the job if you will not get the promotion. such kind of e-mail check by gmail that you are in perfectly
right or not before sending the e-mail gmail ask you few math question .
By default, Mail Goggles is only active late night on the weekend as that is the time you’re most likely to need it. Once enabled, you can adjust when it’s active in the General settings.
