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Getting error while trying to send email from ASP.net application?
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See more: C#ASP.NETmailing
In my application I would like to send a mail and I am using the below code, but I get the error: 
Could not send the e-mail - error: Failure sending mail.
 protected void btnsend_Click(object sender, EventArgs e)
    {
        try
        {
            MailMessage mailMessage = new MailMessage();
            mailMessage.To.Add("xxx@gmail.com");
            mailMessage.From = new MailAddress("xxxx@gmail.com");
            mailMessage.Subject = "ASP.NET e-mail test";
            mailMessage.Body = "Hello world,\n\nThis is an ASP.NET test e-mail!";
            SmtpClient smtpClient = new SmtpClient("smtp.your-isp.com");
            smtpClient.Send(mailMessage);
            Response.Write("E-mail sent!");
        }
        catch (Exception ex)
        {
            Response.Write("Could not send the e-mail - error: " + ex.Message);
        }
    }
Here we are not giving the sender(from)password then how the system will send mail from that sender?
Posted 17 Dec '12 - 3:17
Kavitha le805
Edited 17 Dec '12 - 4:20
André Kraak51.1K
v3
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Comments
ridoy - 17 Dec '12 - 15:00
where is your port number to send a mail?..i think you miss that

2 solutions

What's the error you are getting? Have a look at this sample:
Send Mail / Contact Form using ASP.NET and C#[^]
  Permalink  
Posted 17 Dec '12 - 3:20
Zafar Sultan3.9K
Edited 17 Dec '12 - 3:23
v2
Comments
Kavitha le - 17 Dec '12 - 9:21
Could not send the e-mail - error: Failure sending mail.
zafar sultan - 17 Dec '12 - 9:24
I have updated the reply. Check the sample and see if it works for you.
Kavitha le - 17 Dec '12 - 9:36
Ok i will check. But one doubt here we are not giving the sender(from)password then how the system will send mail from that sender?
Armando Talex - 17 Dec '12 - 10:56
Make sure that you are having the correct value for the following values. smtp.Host = "your server host address"; smtp.Port = server port number;
Kavitha le - 18 Dec '12 - 9:24
How will i get server port number?
zafar sultan - 18 Dec '12 - 10:22
Can you share your code? because all the solutions suggested to you does work. regarding port number, it is the port number that your SMTP server use for e-mails. In general, it is 25. For example, Gmail's SMTP server use port 587 as described in the solution below.
var smtp = new System.Net.Mail.SmtpClient();
    {
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 587;
        smtp.EnableSsl = true;
        smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
        smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
        smtp.Timeout = 20000;
    }
    // Passing values to smtp object
    smtp.Send(fromAddress, toAddress, subject, body);
  Permalink  
Posted 17 Dec '12 - 5:11
Krunal Rohit27.7K
Comments
Kavitha le - 18 Dec '12 - 5:00
Hai Krunal, Can you please give the complete code? here where should i add this?
Kavitha le - 18 Dec '12 - 5:47
Error 1 The type or namespace name 'NetworkCredential' could not be found (are you missing a using directive or an assembly reference?) getting this error while trying
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