How to Send Email in ASP.NET C#

How to send email in ASP.NET C#

Just go through the below code.

SmtpClient smtpClient = new SmtpClient("mail.MyWebsiteDomainName.com", 25);

smtpClient.Credentials = new System.Net.NetworkCredential("info@MyWebsiteDomainName.com", "myIDPassword");
// smtpClient.UseDefaultCredentials = true; // uncomment if you don't want to use the network credentials
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.EnableSsl = true;
MailMessage mail = new MailMessage();

//Setting From , To and CC
mail.From = new MailAddress("info@MyWebsiteDomainName", "MyWeb Site");
mail.To.Add(new MailAddress("info@MyWebsiteDomainName"));
mail.CC.Add(new MailAddress("MyEmailID@gmail.com"));

smtpClient.Send(mail);

send email asp.net c#

Sending Email from Asp.Net:

    MailMessage objMail = new MailMessage("Sending From", "Sending To","Email Subject", "Email Body");
    NetworkCredential objNC = new NetworkCredential("Sender Email","Sender Password");
    SmtpClient objsmtp = new SmtpClient("smtp.live.com", 587); // for hotmail
    objsmtp.EnableSsl = true;
    objsmtp.Credentials = objNC;
    objsmtp.Send(objMail);

Send email using asp.net, C#

You should change the CC code to

if(!String.IsNullOrWhitespace(ccddl1.SelectedValue.ToString())
{
    mail.CC.Add(new MailAddress(ccddl1.SelectedValue.ToString());
}

if (!String.IsNullOrWhitespace(ccddl2.SelectedValue.ToString())
{
   mail.CC.Add(new MailAddress(ccddl2.SelectedValue.ToString()));
}

Sending mail Using C# asp.net

Try adding something like this
Per Dominic's answer on Stackoverflow look at he following example

using System.Net;
using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

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

//----------------- A simple approach below ---------------
I just tested this below and it works

var mail = new MailMessage();

// Set the to and from addresses.
// The from address must be your GMail account
mail.From = new MailAddress("noreplyXYZ@gmail.com");
mail.To.Add(new MailAddress(to));

// Define the message
mail.Subject = subject;
mail.IsBodyHtml = isHtml;
mail.Body = message;

// Create a new Smpt Client using Google's servers
var mailclient = new SmtpClient();
mailclient.Host = "smtp.gmail.com";//ForGmail
mailclient.Port = 587; //ForGmail


// This is the critical part, you must enable SSL
mailclient.EnableSsl = true;//ForGmail
//mailclient.EnableSsl = false;
mailclient.UseDefaultCredentials = true;

// Specify your authentication details
mailclient.Credentials = new System.Net.NetworkCredential("fromAddress@gmail.com", "xxxx123");//ForGmail
mailclient.Send(mail);
mailclient.Dispose();

//The .config settings there are two options on how you could set this up I am suspecting that this is the issue you are having

<system.net>
    <mailSettings>
      <smtp from="from@gmail.com" deliveryMethod="Network">
        <network userName="from@gmail.com" password="mypassword" host="smtp.gmail.com" port="587"/>
      </smtp>             
    </mailSettings>
  </system.net>

or option 2

<configuration>
    <appSettings>
        <add key="smtpClientHost" value="mail.localhost.com"/> //SMTP Client host name
        <add key="portNumber" value="587"/>
        <add key="fromAddress" value="yourEmailAddress@gmail.com"/>
    </appSettings>
</configuration>

How to send email using ASP.NET, C# and GMail

Before calling SmtpClient.Send(), add:

smtp.UseDefaultCredentials = false;

According to the MSDN SmtpClient page, UseDefaultCredentials is set to false by default, but there seems to be a bug somewhere that is setting it to true. Explicitly set it to false before sending the message and it should be all set.

Sending email in .NET through Gmail

Be sure to use System.Net.Mail, not the deprecated System.Web.Mail. Doing SSL with System.Web.Mail is a gross mess of hacky extensions.

using System.Net;
using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

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

Additionally go to the Google Account > Security page and look at the Signing in to Google > 2-Step Verification setting.

• If it is enabled, then you have to generate a password allowing .NET to bypass the 2-Step Verification. To do this, click on Signing in to Google > App passwords, select app = Mail, and device = Windows Computer, and finally generate the password. Use the generated password in the fromPassword constant instead of your standard Gmail password.
• If it is disabled, then you have to turn on Less secure app access, which is not recommended! So better enable the 2-Step verification.

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