(1) Call the recipient: "Hi ... just to let you know that I will send you email shortly"
(2) Write and click SEND button
(3) Call the recipient: "Hi.. I have just sent you an email, could you please check?"
(4) Send SMS: "A gentle reminder: I have just sent you an email, please check and read".
(5) Write on his/her Facebook time line or mention him/her in Twitter "Hi dude, please check your email
(6)If necessary, send FAX: "Dear Sir/Madam, please kindly check and read your email"
