Fixed it, still don't understand what went wrong because the email address is valid, and I don't know if I'm allowed to do this but i'm gonna paste the code that I am currently using, because it seems stack overflow has very strict rules
Imports System.Net.Mail
Imports System.Text
Partial Class ContactUs
Inherits System.Web.UI.Page
Protected Sub btnSend_Click(sender As Object, e As EventArgs) Handles btnSend.Click
Dim body As String = "From: " + txtName.Text + Environment.NewLine +_
"Email: " + txtEmail.Text + Environment.NewLine + "Contact Number: " +_
txtTel.Text + Environment.NewLine + Environment.NewLine + txtComments.Text
Dim MM As New System.Net.Mail.SmtpClient
MM.Host = "mail.bulldogbroadband.co.za"
Dim cred As New System.Net.NetworkCredential("jaun@bulldogbroadband.co.za", "1@2345")
MM.Credentials = cred
MM.Send(txtEmail.Text, "jaun@bulldogbroadband.co.za", "feedback form", body)
Response.Redirect("ThankYou.aspx")
End Sub
End Class