I'm using the System.Web.Mail.SmtpMail object
to send email from an ASP.NET application. I use the SmtpServer values "127.0.0.1" and it works fine and send an email from the Windows Server or from my WindowXP Pro development but when I test the sending email from the Window Vista development, it fails to send an email because of "The "SendUsing" configuration value is invalid". I'm wondering what cause the SendUsing configuration value is invalid in Window Vista Ultimate. Also, I tried to use my Outgoing Mail Server (SMTP) but still doesn't work. Does anyones knows why and how do I fix this issue? Thanks and really appreciated!
//Attach pdf report to email