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Fail to send email to hotmail account through SMTP service of IIS in asp.net

Posted on 2008-06-26
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Last Modified: 2009-07-29
In asp.net, I send email through SMTP service of IIS 6.  When I sent emails to gamil or yahoo account, I can receive them. But When I sent email to hotmail account, I cannot receive it in 99% situation. Only about 1% of chances I can get it in hotmail.

Please help, thanks

The following is my asp.net code:
            System.Web.Mail.MailMessage Email = new System.Web.MailMailMessage();
            Email.From = TextBoxEmailFrom.Text;
            Email.To = TextBoxEmailTo.Text;            
            Email.Subject = TextBoxEmailSubject.Text;
            Email.Body = TextBoxEmailBody.Text;
            Email.Priority = MailPriority.High;
            Email.BodyFormat = MailFormat.Text;
            System.Web.Mail.SmtpMail.SmtpServer.Insert(0, "127.0.0.1");
            System.Web.Mail.SmtpMail.Send(Email);
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Question by:BrainyYack1
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Accepted Solution

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meverest earned 2000 total points
ID: 21892555
Hi,

first of all, if this script is available to the internet, you have effectively published an open relay spam engine since anyone can use the form to send email to any address.

in any case, you need to take a look at the smtp service logs to determine the reason that hotmail is not receiving the outbound msgs.

by default, the logs are stored at %systemroot%\system32\logfiles\smtpsvc1\

cheers.
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