error when trying to send email using smtp 'System.Net.Mail.SmtpException' in System.dll

Question

trying to send a password recovery email using the smpt protocol in c# and for some reason I can't seem to get it right. I will highly appreciate it of someone could help. This is what I was relying on. And Here's the code:

enter cpublic void sendEmailWithPass( string username , string email , string password)
    {
        try
        {
            var fromAddress = new MailAddress("xxx", "xxx");
            var toAddress = new MailAddress(email, "CLIENT!");
            const string fromPassword = "xxx";
            string subject = "recover password";
            string body = "heloo! \n according to your request your password is: \n " + password;
            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); }
            SendMessage("&answerForgotRequest&true!");
        }
        catch
        {
            SendMessage("&answerForgotRequest&failed!");
        }            
    }

in addition, this is the line which corresponds to the error

 public void answerServer(string message)
    {
        string ans = message.Split('&')[2];

 if (ans.StartsWith("failed!"))
        {
            MessageBox.Show("an error was occured while trying sending the mail");
        }

]

@Michael Randall, I have looked at the other question and still did not manage to make it work — Johnathan Hershkovich, Feb 26 '19 at 03:43
No we will need why its failed, how does it tell you its failed, this is what we need to know. what does it return — TheGeneral, Feb 26 '19 at 03:52
@MichaelRandall I don't know what you are asking for, I put the code of how I try to put the email, and the condition where it sends me that there was an error sending the email. I'm really having a hard time — Johnathan Hershkovich, Feb 26 '19 at 04:06
@JohnathanHershkovich you should catch your exception ```catch (Exception e)``` then you can actually see what your error is. The exception will give you more information, with which maybe we can help you. — Jerry, Feb 26 '19 at 04:10
What I am trying to say is that I am running the program and when I try to recover the password of some random user, a window pops up displaying the error message saying "an error has occurred while trying sending the email — Johnathan Hershkovich, Feb 26 '19 at 04:11
"an error has occurred while trying sending the email" does not give any indication of what the error was. — Jerry, Feb 26 '19 at 04:12
How can I know what the error is? I'm sorry about all my dumb questions I'm just really struggling with it. It does not display any error message other than tha t — Johnathan Hershkovich, Feb 26 '19 at 04:17
ok so I opened te Error List Window on visual studio and this is what it returned: Exception thrown: 'System.Net.Mail.SmtpException' in System.dll — Johnathan Hershkovich, Feb 26 '19 at 04:20
```catch (Exception e) { var whatWeNeedToHelpYou = e.InnerException; }``` — Jerry, Feb 26 '19 at 04:24
@Jerry Exception thrown: 'System.Net.Mail.SmtpException' in System.dll — Johnathan Hershkovich, Feb 26 '19 at 04:28
That is what threw the exception, not the exception itself. When you wrap your code in try/catch blocks and throw the exception away it is very difficult to debug your code. — Jerry, Feb 26 '19 at 04:32

score 0 · Answer 1 · edited Sep 30 '21 at 22:36

Since you are struggling with this, you need to at least try to catch the exception, no-one can help you as you are just throwing it away:

try
{
    // email code
}
catch(Exception ex)
{
    // breakpoint this line (yes look up online how to do it)
    MessageBox.Show(Ex.ToString());
    // write it to file if you need to
    //File.WriteAllText("someFileName.Txt",Ex.ToString() );
}

Then when you have an actual exception, please paste it (or ask a new question) so we know what's happening.

You might want to have a look at these too:

Exception Handling (C# Programming Guide)

Navigate through code with the Visual Studio debugger

error when trying to send email using smtp 'System.Net.Mail.SmtpException' in System.dll

1 Answers1