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cannot relay through smtp server in asp.net

dave_e_work asked
Last Modified: 2012-05-09
him hope you can help, I have the following code:

Dim SmtpServer As New SmtpClient()
SmtpServer.Credentials = New Net.NetworkCredential("enquiries@mydomain.com", "mypassword")
SmtpServer.Host = "smtp.mydomain.com"
SmtpServer.EnableSsl = False
mail.From = New MailAddress("enquiries@mydomain.com", "Mr Smith", System.Text.Encoding.UTF8)
mail.Subject = "Website Contact Entry"
mail.IsBodyHtml = True
mail.Body = "my message"

The thing is, it works perfect when I run it from my localhost, as soon as it is live, it doesn't work, doesn't show any errors and looks like it has sent it.

Can you point me in the right direction?

thanks in advance
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