Help I can sent emails from the website

This worked last night but now whatever I try, I can not receive any emails from the website. Do I need to be doing anything else in the web config file for example?

Dim s_Subject As String = "Test"
Dim s_Send_From As String = "[email protected]"
Dim s_Send_To As String = "[email protected]"
Dim s_Email_Body As String = "This is a test"


Dim objSMTP As New SmtpClient
Dim Message As New MailMessage

objSMTP.Host = "localhost"

Message.From = New MailAddress(s_Send_From)
Message.To.Add(s_Send_To)
Message.Subject = s_Subject
Message.IsBodyHtml = False
Message.Body = s_Email_Body

objSMTP.Send(Message)

 

Your script looks good to me. Did you try looking in a spam folder?