I am sorry for that I have not clarified this issue. The "internet mail
service" should be configured in the exchange server.
On the other hand, I have done more research regarding this issue and I
think that we should check the following firstly. Would please tell me if
you are testing the following sample?
HOWTO: Send E-mail Programmatically with System.Web.Mail and Visual Basic
How do you replace the following statement?
SmtpMail.SmtpServer = "MySMTPServer"
Have you tried to use
SmtpMail.SmtpServer = "smarthost"
Please try to perform the steps on the above Knowledge Base article and
test the "smarthost".
Please update me your testing result at your earliest convenience.
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