Cannot send email in ASP.NET through Godaddy servers

Question

I have an ASP.NET application hosted on Godaddy that I want to send email from. When it runs, I get: Mailbox name not allowed. The server response was: sorry, relaying denied from your location. The important parts of the code and Web.config are below:

msg = new MailMessage("accounts@greektools.net", email);
        msg.Subject = "GreekTools Registration";
        msg.Body =
            "You have been invited by your organization to register for the GreekTools recruitment application.<br/><br/>" +
            url + "<br/><br/>" +
            "Sincerely,<br/>" +
            "The GreekTools Team";

        msg.IsBodyHtml = true;

        client = new SmtpClient();
        client.Host = "relay-hosting.secureserver.net";

        client.Send(msg);

<system.net>
<mailSettings>
  <smtp from="accounts@greektools.net">
    <network host="relay-hosting.secureserver.net" port="25" userName="********" password="*********" />
  </smtp>
</mailSettings>

Answer 1

1- If your site is hosted on godaddy you may use "relay-hosting.secureserver.net" without credentials.

2- If your site is hosted outside of godaddy you may use "smtpout.secureserver.net" with you email account credentials.

PS: Please change port 3535 if you have problems with 25

Hosted On GoDaddy

    <system.net>
      <mailSettings>
       <smtp from="abc@xyz.net">
        <network host="relay-hosting.secureserver.net"/>
       </smtp>
      </mailSettings>
    </system.net>

External

  <system.net>
    <mailSettings>
      <smtp from="abc@xyz.net">
        <network host="smtpout.secureserver.net" 
           userName="abc@xyz.net" password="your_password_here" 
           port="25" />
      </smtp>
    </mailSettings>
  </system.net>

Answer 2

Here's my email class:

public class Email
{
    public enum MailAddressType
    {
        From = 1,
        Bcc
    }

    private static MailAddress _from = null;

    public static void SendEmail(string to, string subject, string body)
    {
        SendEmail(to, subject, body, From, string.Empty);
    }

    public static void SendEmail(string to, string subject, string body, string from)
    {
        SendEmail(to, subject, body, from, MailAddressType.From);
    }

    public static void SendEmail(string to, string subject, string body, string addresses, MailAddressType addressType)
    {
        MailAddress from = From;
        string bcc = string.Empty;

        if (MailAddressType.From == addressType)
        {
            from = new MailAddress(addresses);
        }
        else
        {
            bcc = addresses;
        }

        SendEmail(to, subject, body, from, bcc);
    }

    private static void SendEmail(string to, string subject, string body, MailAddress from, string bcc)
    {
        MailMessage message = new MailMessage();
        message.From = From;
        message.To.Add(to);
        if (!string.IsNullOrEmpty(bcc))
        {
            message.Bcc.Add(bcc);
        }
        message.ReplyTo = from;
        message.Subject = subject;
        message.Body = HttpContext.Current.Server.HtmlEncode(body);
        SmtpClient smtp = new SmtpClient();
        smtp.Send(message);
    }

    public static MailAddress From
    {
        get
        {
            if (null == _from)
            {
                SmtpSection section = (SmtpSection)ConfigurationManager.GetSection("system.net/mailSettings/smtp");
                string address = section.From;
                string displayName = ConfigurationManager.AppSettings["fromEmailDisplayName"];
                _from = new MailAddress(address, displayName);
            }
            return _from;
        }
    }
}

And here are the related web.config settings:

<appSettings>
    <add key="fromEmailDisplayName" value="Firstname Lastname"/>
</appSettings>

<system.net>
    <mailSettings>
        <smtp deliveryMethod="Network" from="myname@mydomain.com">
            <network host="relay-hosting.secureserver.net" />
        </smtp>
    </mailSettings>
</system.net>

For me, the key was "message.From = From" and "message.ReplyTo = from". GoDaddy seems to want the message to come from an address in your domain. So for contact pages, use your default email address as the From and set the sender as the ReplyTo. Email goes through fine after that.

Answer 3

This is likely a reply from the SMTP server because the machine attempting to send email has not been whitelisted (or is blacklisted for SPAM). Is relay-hosting.secureserver.net a GoDaddy server, or is it on a different network? You might want to find a GoDaddy server that enables email to be relayed. I would imagine a lot of shared hosting providers have restrictions today.

I would find out what type of SMTP server you are using and what anti-spam measures are in place. The administrator may be able to add the GoDaddy server to the whitelist of allowed hosts. You need to be very careful and make sure that you application cannot be used as a proxy for a spammer. Make sure to validate all input to ensure it it safe.

Answer 4

Check your hostname. Are you sure your account isn't configured to use mail.greektools.net ?That's the default format for GoDaddy webhosting..

Answer 5

set

defaultCredentials="false"

in your network element

     <network host="relay-hosting.secureserver.net" port="25" userName="********" password="*********" defaultCredentials="false" />

Answer 6

What email or relay server should I use in my ASP.NET 3.5 code?

You do not need to provide a user name and password for this relay server.

Answer 7

Just for a test. Remove the username and password values from the web.config.

Then, in your code set

//call this line, before you call .Send
client.Credentials = CredentialCache.DefaultNetworkCredentials; 
client.Send(msg)

Answer 8

I just asked GoDaddy, how to set up a SMTP form mailer, and they told me that I'd need to use a Relay Server, with no username, no password, and no port. The server name to use was, the same name that you used.

Answer 9

var message = new MailMessage();
message.To.Add(new MailAddress("email-address")); 
message.From = new MailAddress("email-address");  
message.Subject = "subject";
message.Body = string.Format("message-body");
message.IsBodyHtml = true;
using (var smtp = new SmtpClient())
{
    smtp.Host = "relay-hosting.secureserver.net";
    smtp.EnableSsl = false;
    smtp.Credentials = CredentialCache.DefaultNetworkCredentials;
    await smtp.SendMailAsync(message);
}

Answer 10

For those who want to know what should be C# code in addition to the accepted answer, below code worked for me. Please note that "from" address is already mentioned in web.config in the accepted answer, so no need to mention it in C# code.

    public static void SendMail(string emailid, string subject, string body)
    {
        System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();

        System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();

        msg.To.Add(new MailAddress(emailid));

        msg.Subject = subject;
        msg.IsBodyHtml = true;
        msg.Body = body;

        client.Send(msg);
    }

Answer 11

Try below code:

smtp.Host = "relay-hosting.secureserver.net";
smtp.Port = 25;
smtp.Credentials = new System.Net.NetworkCredential("test@yourwebsitedomain.com", "*******");

It worked for me.