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How to configure IIS5 SMTP to send email from my development environment?

I am trying to send an email from an ASP.NET web application using the SmtpClient class. So far, I have provided relay access to 127.0.0.1. I am trying to send test emails to my gmail account. EML files are stuck in the mailroot queue folder. My WinXP firewall is disabled. I do not receive exceptions in the code, but letters are not delivered to the destination address. I also tried other email accounts.

        SmtpClient client = new SmtpClient();
        client.Host = "127.0.0.1";

        MailMessage message = new MailMessage();
        message.To.Add("myemail@gmail.com");
        message.From = "name@domain.com";
        message.Subject = subject;
        message.IsBodyHtml = false;
        message.Body = body;

        client.Send(message);

Here is a snippet from the IIS SMTP log.

Software: Microsoft Internet Information Services 5.1
Version: 1.0
Date: 2009-01-16 18:28:28
Fields: time c-ip cs-method cs-uri-stem sc-status 
18:28:28 127.0.0.1 EHLO - 250
18:28:28 127.0.0.1 MAIL - 250
18:28:28 127.0.0.1 RCPT - 250
18:28:28 127.0.0.1 DATA - 250
18:29:45 127.0.0.1 MAIL - 250
18:29:45 127.0.0.1 RCPT - 250
18:29:45 127.0.0.1 DATA - 250
18:30:37 127.0.0.1 QUIT - 0
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5 answers

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(It is mine). I think yahoo should have some kind of protocol? Or are we setting the wrong protocol? Still featured .. Send me an email pls jokenjp@yahoo.com (with a good subject, so I don't think it's spam)

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