The message can not reach the email

Question

I'm trying to build a contact form in my website, I'm using asp.net with C#, when I submit the message it does not reach the Email, is it because I'm using local server? or there are mistakes in my code? I got this error message in the catch section: "Your message failed to send, please try again."

this is the code behind page C#

try
{
    //Create the msg object to be sent
    MailMessage msg = new MailMessage();
    //Add your email address to the recipients
    msg.To.Add("[email protected]");
    //Configure the address we are sending the mail from
    MailAddress address = new MailAddress("[email protected]");
    msg.From = address;
    //Append their name in the beginning of the subject
    msg.Subject = txtName.Text + " :  " + ddlSubject.Text;
    msg.Body = txtMessage.Text;

    //Configure an SmtpClient to send the mail.
    SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
    client.EnableSsl = true; //only enable this if your provider requires it
    //Setup credentials to login to our sender email address ("UserName", "Password")
    NetworkCredential credentials = new NetworkCredential("[email protected]", "*");
    client.Credentials = credentials;

    //Send the msg
    client.Send(msg);

    //Display some feedback to the user to let them know it was sent
    lblResult.Text = "Your message was sent!";

    //Clear the form
    txtName.Text = "";
    txtMessage.Text = "";
}
catch
{
    //If the message failed at some point, let the user know
    lblResult.Text = "Your message failed to send, please try again.";
}

this is the exception

System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at Default2.btnSubmit_Click(Object sender, EventArgs e) in c:\Users\looly\Documents\Visual Studio 2015\WebSites\WebSite6\Default2.aspx.cs:line 46

We want to know the correct exception so just remove label inside the catch block.then Wrote exception..Catch(exception ex){throw ex}; — Rajeesh Menoth
At first glance your code seems OK. Have you configured Gmail correctly? It often blocks sending from apps it considers unsecured. Look if you have 2 step enabled, you might need need to generate an app specific password SEE HERE — Equalsk
I get $10 if the exception is pretty much The server response was: 5.5.1 Authentication Required. — Equalsk

Rajeesh Menoth Rajeesh Menoth · Accepted Answer · 2015-12-15T12:42:30

The server response was: 5.5.1 Authentication

Based on this error.you check the following steps.

Enter the correct login password.
To remove 2-Step Verification.
You have to enable login from other timezone / ip for your google account.To do this follow the click here and allow access by clicking the continue button.
Go to security settings at the following Click here and enable less secure apps . So that you will be able to login from all apps.

The message can not reach the email

1 Answers