STEP 5 : However, you will get the options of up to 5,10,20 and 30 seconds.Hence you can schedule it for 30 seconds.
STEP 6 : Now save the scheduled email,and your settings will be changed
STEP 7 : Now whenever you send the emai, you will see an option on the left side of the screen in which the first message sent will be written. After this, undo and view message will be reported.
STEP 8 : Now you can click on the undo option if you have accidentally sent the email to someone.This will return the email immediately