All mail sent using Fast2host servers must use authentication.
 This is an example of adding authentication to your mail script using System.Web.Mail:
 
 
 Protected Sub SendMail()
 Dim mm As New System.Net.Mail.MailMessage
 mm.Subject = "Email Subject Here"
 mm.IsBodyHtml = False ' If using True, ensure that mm.Body is correctly formatted HTML (example below uses plain text)
 ' create the body text in the email
 Dim sb_body As New StringBuilder
 sb_body.AppendLine("Dear Person,")
 sb_body.AppendLine("")
 sb_body.AppendLine("This email was sent using ASP.NET from Fast2Host.com's hosting package")
 sb_body.AppendLine("")
 sb_body.AppendLine("Kind Regards")
 mm.Body = sb_body.ToString
 ' add recipient(s)
 mm.To.Add(New System.Net.Mail.MailAddress("SendTo@Address.Here",  "Recipients Name")) ' you can re-use this line to add more recipients
 mm.From = New System.Net.Mail.MailAddress("Sender@Address.Here", "Sender's Name") ' this can be any email address you like
 ' Send via Fast2Host server
 Dim mc As New System.Net.Mail.SmtpClient
 mc = New System.Net.Mail.SmtpClient("mail.mydomain.com") 'replace mydomain.com with your domain name
 mc.UseDefaultCredentials = False
 mc.Credentials = New  System.Net.NetworkCredential("user@mydomain.com",  "MyPassword") 'this MUST be a valid account created within your control  panel
 mc.Send(mm)
 End Sub
Email any time or call 01480 26 00 00 014 80 26 00 00