This is a generic version of what I use when I send something. It needs to be in HTML format. You can change the txt Items to whatever you need for your purpose.
Sub SendIntroMail()
Dim msgSample as New MailMessage
msgSample.BodyFormat = MailFormat.HTML
msgSample.To = txtFirstName.Value & _
" " & txtLastName.Value & _
" (" & txtEmailAddr.Value & "

"
msgSample.From = "webmaster@domain.com"
msgSample.Headers.Add("Reply-To", "support@domain.com"

msgSample.Priority = MailPriority.High
msgSample.Subject = "Your Subject Line"
msgSample.Attachments.Add(New MailAttachment( _
Server.MapPath("images/imagename.gif"

))
msgSample.Body = _
"<table>" & vbCrLf & _
"<tr><td><img src=clad-left.gif></td>" & _
"<td>Thanks for visiting domain.com</td></tr>" & _
"</table>" & vbCrLf
SmtpMail.Send(msgSample)
End Sub