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Editorial Team
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Asked: 2026-06-07T13:49:08+00:00

I am getting this Error , Send Email Failed.Mailbox unavailable. The server response was:

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I am getting this Error ,

Send Email Failed.Mailbox unavailable. The server response was: 5.7.1 
Unable to relay for myEmail@itaxsmart.com

Before this i was using godeady for databse and publish site .this code working Before,
Now i have transfer and published my Database and site on my Dedicated server and i am Getting unable to Replay from server’s IP Error

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1 Answer

  1. Editorial Team

    Note: system.net.mail namespace is used for emailing.

     protected void btnsubmit_Click(object sender, ImageClickEventArgs e)
    {
 //Code for send Email
            MailMessage sendMailforSA = new MailMessage();
            SmtpClient smtpforSA = new SmtpClient();
            string subjectforSA = null;
            subjectforSA = "Thanks for apply";
            System.Net.NetworkCredential credforSA = new System.Net.NetworkCredential("Superman@gmail.com", "password");
            sendMailforSA.To.Add(txtemailid.Value);
            MailAddress cc = new MailAddress("info@superman.com");
            sendMailforSA.CC.Add(cc);

 // sendMailforSA.CC("abcxxx@gmail.com");

     sendMailforSA.From = new MailAddress("Rajnikant@gmail.com");
            sendMailforSA.Subject = subjectforSA.ToString();
            sendMailforSA.Body =" Thank you.... your message you can use html tag for style effect";
            sendMailforSA.IsBodyHtml = true;
            smtpforSA.Host = "smtp.gmail.com";
            smtpforSA.Port = 25;
            smtpforSA.EnableSsl = false;
            smtpforSA.UseDefaultCredentials = false;
            smtpforSA.Credentials = credforSA;
            smtpforSA.Send(sendMailforSA);

}

    http://satindersinght.blogspot.in/2012/01/how-to-send-email-in-asp.html

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