I have the code below for sending email in vb.net
Dim myMessage As New MailMessage()
myMessage.From = New MailAddress("", "Testtttt")
myMessage.[To].Add("TO_EMAIL@TEST.com")
myMessage.Subject = "Testing"
myMessage.IsBodyHtml = True
myMessage.Body = "<html><body><h3>Testing !!</h3> </body></html>"
myMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure
Dim SenderMailAccount As String = ""
Dim SenderMaillPass As String = ""
Dim mySmtpClient As New SmtpClient()
Dim myCredential As New System.Net.NetworkCredential(SenderMailAccount, SenderMaillPass)
mySmtpClient.Host = ""
mySmtpClient.UseDefaultCredentials = False
mySmtpClient.Credentials = myCredential ...
Go to the complete details ...