C# Email Send To Exchange Slow but Immediate if I Close My App

C# Email Send To Exchange Slow but Immediate if I Close My App

References

Reference NO 1

http://stackoverflow.com/questions/15165439/c-sharp-email-send-to-exchange-slow-but-immediate-if-i-close-my-app

Reference NO 2

http://stackoverflow.com/questions/2176400/how-to-send-receive-mail-from-ms-exchange

Reference NO 3

http://stackoverflow.com/questions/tagged/smtpclient?page=2&sort=newest

Reference NO 4

http://stackoverflow.com/questions/1261745/is-system-net-mail-smtpclient-send-synchronous

Reference NO 5

http://stackoverflow.com/questions/9537339/how-to-send-mails-using-smtpclient-and-defaultnetworkcredentials-to-a-distributi

Reference NO 6

http://social.msdn.microsoft.com/Forums/en-US/a75533eb-131b-4ff3-a3b2-b6df87c25cc8/action?threadDisplayName=how-do-i-send-mail-using-c

Reference NO 7

#EANF#

Reference NO 8

#EANF#