How to Send Mail in Asp.net in C#

Question

Possible Duplicate:
No connection could be made because the target machine actively refused it?

I Face Critical Problem During Sending Mail in Asp.net please tell me Solution if Anyone know About this. This Is My Code for Sending Mail

MailMessage mm = new MailMessage();

        SmtpClient smtp = new SmtpClient();

        mm.From = new MailAddress(txtfrom.Text);

        mm.To.Add(new MailAddress(txtto.Text));



        mm.Subject = txtsubject.Text;

        mm.Body = txtmessage.Text;

        mm.IsBodyHtml = true;

        smtp.Host = "smtp.gmail.com"; //You can add this in the webconfig

        smtp.EnableSsl = true;

        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();

        NetworkCred.UserName = "mymail@gmail.com";

        NetworkCred.Password = "my password";
        smtp.UseDefaultCredentials = true;

        smtp.Credentials = NetworkCred;

        smtp.Port = 587; //this is Gmail port for e-mail

        smtp.Send(mm);//send an e-mail

The Problem is That when i Click on Send Button it Show following Error

"No connection could be made because the target machine actively refused it 173.194.79.109:587"

Please tell me Solution ..

Why are you setting UseDefaultCredentials to true? This will try to send the credentials of the currently logged on user, not the ones you have initialised - set this to false and retry. — Kevin Main, May 15 '12 at 09:44
ref [Sending email in .NET through Gmail](http://stackoverflow.com/questions/32260/sending-email-in-net-through-gmail) and set `UseDefaultCredentials` to `false` as you are specifying your custom credentials — Niranjan Singh, May 15 '12 at 09:50

score 0 · Answer 1 · answered May 15 '12 at 09:43

0

you need to set false the UseDefaultCredentials property.

smtp.UseDefaultCredentials = false;

answered May 15 '12 at 09:43

Adeel

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i Set smtp.UseDefaultCredentials = false; but it not Working – Lakhbir Chandel May 15 '12 at 10:43

score 0 · Answer 2 · answered May 15 '12 at 09:44

0

That error message usually means a firewall is blocking your connection. Instead of using your machine name "173.194.79.109:587", try using "localhost".

answered May 15 '12 at 09:44

coder

13,002
31
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Sir i Use All of Your Above Code but its not Working Even i Set smtp.UseDefaultCredentials = false; but it Also Show Error "Unable to Connect Remote Server"??? Please tell me Particular Solution...... Thanks For Good Response on my Question All of u.. – Lakhbir Chandel May 15 '12 at 10:30
Are you using any antivirus on your system? – coder May 15 '12 at 11:10
Yes i use Macfee Antivirus on my pc – Lakhbir Chandel May 15 '12 at 11:57
Try to remove it and check as mainly that causes issue. – coder May 15 '12 at 12:33

score 0 · Answer 3 · edited Feb 19 '16 at 15:03

This is how I use it.

SmtpClient gglClient = new SmtpClient("173.194.67.108", 587);
gglClient.UseDefaultCredentials = false;
gglClient.DeliveryMethod = SmtpDeliveryMethod.Network;
gglClient.Credentials = new NetworkCredential("username@gmail.com", "password");
gglClient.EnableSsl = true;

MailMessage msg = new MailMessage("", email);
msg.Subject = "";
msg.Body = @" ";

msg.IsBodyHtml = false;
msg.BodyEncoding = UTF8Encoding.UTF8;

gglClient.Timeout = 8000;
ServicePointManager.ServerCertificateValidationCallback =
    delegate(object s, X509Certificate certificate, X509Chain chain,
        SslPolicyErrors sslPolicyErrors) { return true; };

gglClient.Send(msg);

score 0 · Answer 4 · answered May 15 '12 at 10:18

    protected void SendMail_Click(object sender, EventArgs e)
    {
        var fromAddress = new MailAddress(fromid.Text, fromname.Text);
        var toAddress = new MailAddress(toid.Text, toname.Text);
        string fromPassword = pswd.Text;
        string subject = subjectbox.Text;
         string body = bodybox.Text;

        var smtp = new SmtpClient
        {
            Host = "smtp.gmail.com",
            Port = 587,
            EnableSsl = true,
            DeliveryMethod = SmtpDeliveryMethod.Network,
            Credentials = new NetworkCredential(fromAddress.Address, fromPassword),
            Timeout = 20000
        };
        using (var message = new MailMessage(fromAddress, toAddress)
        {
            Subject = subject,
            Body = body,
            IsBodyHtml = false

        })
        {
            smtp.Send(message);
        }

    }

score 0 · Answer 5 · answered May 15 '12 at 10:41

This is the function which i checked to send mail...and it's working properly.

`

    private static bool testsendemail(MailMessage messageBody)
    {

        try

        {

        MailMessage message1 = new MailMessage();

        SmtpClient smtpClient = new SmtpClient();

        string msg = string.Empty;

        MailAddress fromAddress = new MailAddress("FromMail@Test.com");
        message1.From = fromAddress;
        message1.To.Add("ToMail@Test1.com");
        message1.Subject = "This is Test mail";
        message1.IsBodyHtml = true;
        message1.Body ="You can write your body here"+messageBody;
        smtpClient.Host = "smtp.mail.yahoo.com"; // We use yahoo as our smtp client
        smtpClient.Port = 587;
        smtpClient.EnableSsl = false;
        smtpClient.UseDefaultCredentials = true;
        smtpClient.Credentials = new  System.Net.NetworkCredential("SenderMail@yahoo.com", "YourPassword");

        smtpClient.Send(message1);
    }
    catch
    {
        return false;
    }
    return true;

}`

Thank You.

How to Send Mail in Asp.net in C#

5 Answers5