smtp error: unable to connect to remote server...No connection could be made because the target machine actively refused it

[Homer]

Hi,

I got "InnerException : Unable to connect to remote server"..."No
connection could be made because the target machine actively refused
it" when I attempted to send an email through my Intranet app that is
written in asp.net 2.0. The smtp server is a local server and it uses
Port 25. The Authentication is set to Anonymous Access. Here's my
code:

<system.net>
<mailSettings >
<smtp>
<network host="10.162.22 .72" />
</smtp>
</mailSettings>
</system.net>

Protected Sub SendEmail_Click (ByVal sender As Object, ByVal e As
System.EventArg s) Handles SendEmail.Click
Const ToAddress As String = "so*****@somewh ere.com"
Dim mm As New MailMessage(Use rsEmail.Text, ToAddress)
mm.Subject = Subject.Text
mm.Body = Body.Text
mm.IsBodyHtml = False
Dim smtp As New SmtpClient
smtp.Send(mm)
End Sub

In the <network host.. /section, I did not specify a username and
password because I set the smtp server authentication mode is set to
Anonymous Access. Can someone please tell me what I did wrong? I
couldn't find anything on the Web that could point me in the right
direction.

Thanks,
Jon