Send email using gmail smtp server

Abhishek Kumar

10y7.8k.NET

i am not able to send email from my application (using c#).

i am getting an exception

SMTP Email Error: Unable to read data from the transport connection: net_io_connectionclosed

11 Replies

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Arun Kumar Tiwari6y ago
Try this,

http://www.aspdotnet-suresh.com/2010/12/how-to-send-mail-using-gmail.html
Mageshwaran R6y ago
Hi,
Try this code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Net;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            var client = new SmtpClient("smtp.gmail.com", 587)
            {
                Credentials = new NetworkCredential("[email protected]", "mypwd"),
                EnableSsl = true
            };
            client.Send("[email protected]", "[email protected]", "test", "testbody");
            Console.WriteLine("Sent");
            Console.ReadLine();
        }
    }
}
Shweta Deshmukh7y ago
I am getting data from database exporting in excel and sending the excel file through email..
but unable to send the file. it is showing err: Failure sending mail(inner Exception :unable to read data from the transport connection net_io_connectionclosed. gmail). please help me solve the issue.. would be a great help..
Thanks in Advance sir
Shweta Deshmukh7y ago
public void SendEmail(string MailTo, string MailSubject)

{
try
{
string AppLocation = "";
AppLocation = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().CodeBase);

AppLocation = AppLocation.Replace("file:\\", "");
string file = AppLocation + "\\ExcelFiles\\DataFile.xlsx";

MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient(ConfigurationManager.AppSettings["Host"].ToString());//smtp.gmail.com
mail.From = new MailAddress(ConfigurationManager.AppSettings["MailFrom"].ToString());//[email protected]

mail.To.Add(MailTo); // Sending MailTo

List li = new List();
li.Add("[email protected]");
//mail.CC.Add(string.Join(",", li)); // Sending CC
//mail.Bcc.Add(string.Join(",", li)); // Sending Bcc
mail.Subject = MailSubject; // Mail Subject
//mail.Body = "TwoWaySummary Report *** This is an automatically generated email, please do not reply ***";

System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment(file); //Attaching File to Mail
mail.Attachments.Add(attachment);

// SmtpServer.Port = Convert.ToInt32(ConfigurationManager.AppSettings["PORT"]); //PORT
SmtpServer.Port = 465;//also tried with 587
SmtpServer.EnableSsl = true;
SmtpServer.DeliveryMethod = SmtpDeliveryMethod.Network;
SmtpServer.UseDefaultCredentials = false;
//SmtpServer.Credentials = new NetworkCredential("Email id of Gmail", "Password of Gmail");
// SmtpServer.Credentials = new System.Net.NetworkCredential("[email protected]", "shweta123");
SmtpServer.Credentials = new NetworkCredential("[email protected]", "Rsl@2005");
// SmtpServer.Credentials = new System.Net.NetworkCredential("[email protected]", "shweta123");
SmtpServer.Send(mail);

}
catch (Exception ex)
{
logger(ex.Message);
logger(ex.StackTrace);
}
finally
{
}
}
Rajeesh Menoth10y ago
Hi,

Can you share your code..!!
Abhishek Kumar10y ago
its not working
Rajeesh Menoth10y ago
Hi,

EnableSsl: Check your host accepts SSL Connections (True or False).

Check my article for more reference :

http://www.c-sharpcorner.com/UploadFile/2a6dc5/how-to-send-a-email-using-Asp-Net-C-Sharp/
Amit Kumar10y ago
It is a property of SMTP Class

EnableSsl – Specify whether your host accepts SSL Connections (Gmail: True)

If you will have to create an object of SmtpClient class and allow EnableSsl

SmtpClient client = new SmtpClient();

client.EnableSsl=True;
Abhishek Kumar10y ago
what is client.EnableSsl
Amit Kumar10y ago
Hi dear,

Please use it I think that you will not enable Ssl if you are not enable it . So enable it like

client.EnableSsl = true;

SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;
NetworkCredential NetworkCred = new NetworkCredential(txtEmail.Text, txtPassword.Text);
smtp.UseDefaultCredentials = true;
smtp.Credentials = NetworkCred;
smtp.Port = 587;

after that if this solution is not solve your problem then follow below link..

http://www.aspsnippets.com/Articles/Send-email-using-Gmail-SMTP-Mail-Server-in-ASPNet.aspx
Chandu Kumawat10y ago
hi refer this..

http://www.aspsnippets.com/Articles/Send-email-using-Gmail-SMTP-Mail-Server-in-ASPNet.aspx

http://www.aspdotnet-suresh.com/2010/12/how-to-send-mail-using-gmail.html