The SMTP server requires a secure connection or the client was not authenticated.
I am creating a form using "createuserwizard" in asp.This is my code. <asp:CreateUserWizard ID="userwizard" ContinueDestinationPageUrl="~/secretfiles/secret.aspx" runat="server" > <MailDefinition BodyFileName="register.txt" Subject="Registration Confirmation" From="amrit.enest@gmail.com" /> </asp:CreateUserWizard> This is my web.config file settings. <mailSettings> <smtp deliveryMethod="Network" from="amrit.enest@gmail.com"> <network host="smtp.gmail.com" port="25" userName="amrit.enest@gmail.com" password="sending emails's password" /> </smtp> </mailSettings> Then settled up a Smtp .in ISS