How to Successfully Send Emails in ASP.NET C#?

Successfully Sending Emails using ASP.NET C#

Challenge:

New ASP.NET C# developers often encounter difficulties sending emails. A common issue arises from incorrect SMTP server configuration and authentication.

Initial Code (and its shortcomings):

The following code snippet demonstrates a typical failed attempt:

<code class="language-csharp">MailMessage mailObj = new MailMessage(
    txtFrom.Text, txtTo.Text, txtSubject.Text, txtBody.Text);
SmtpClient SMTPServer = new SmtpClient("127.0.0.1");
try
{
    SMTPServer.Send(mailObj);
}
catch (Exception ex)
{
    Label1.Text = ex.ToString();
}</code>

This code fails because it uses a localhost SMTP server ("127.0.0.1") and lacks proper authentication details.

Corrected Code:

Here's the corrected implementation:

<code class="language-csharp">SmtpClient smtpClient = new SmtpClient("smtp-proxy.tm.net.my", 25);
smtpClient.Credentials = new System.Net.NetworkCredential("[email protected]", "myIDPassword");
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.EnableSsl = true;
MailMessage mail = new MailMessage();

// Setting Sender, Recipient, and CC
mail.From = new MailAddress("info@MyWebsiteDomainName.com", "MyWeb Site");
mail.To.Add(new MailAddress("info@MyWebsiteDomainName.com"));
mail.CC.Add(new MailAddress("[email protected]"));

smtpClient.Send(mail);</code>

Key Improvements:

• Correct SMTP Server: Replace "smtp-proxy.tm.net.my" with your Internet Service Provider's (ISP) SMTP server address.
• Authentication: Replace "[email protected]" with your email address and "myIDPassword" with your email password. Use strong passwords and consider more secure authentication methods where available.
• SSL Encryption: smtpClient.EnableSsl = true; ensures secure communication if your SMTP server requires it. Check your ISP's SMTP settings.
• Explicit MailAddress Objects: Using MailAddress for From, To, and CC provides better error handling and clarity.

Remember to replace the placeholder values with your actual SMTP server details and credentials. Always prioritize secure coding practices and protect your credentials.

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