I'm trying this code in order to send to somewho user his password using the mail he enters.

```
SmtpClient client = new SmtpClient();
client.Port = 587;
client.Host = "smtp.gmail.com";
client.EnableSsl = true;
client.Timeout = 10000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential("fzc.solutions@gmail.com", "********");
//de qui, a qui, objet, sujet
MailMessage mm = new MailMessage("bluepenlabs.aux@gmail.com", "fzc.solutions@gmail.com", "test", "test");
mm.BodyEncoding = UTF8Encoding.UTF8;
mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
client.Send(mm);

```

Here is the error :

> 
> Une exception non gérée du type 'System.Net.Mail.SmtpException' s'est
>  produite dans System.dll
> 
> 
> Informations supplémentaires : Le serveur SMTP requiert une connexion
>  sécurisée ou le client n'était pas authentifié. La réponse du serveur
>  était : 5.5.1 Authentication Required. Learn more at
> 
> 
> 

I'll Translate here :

> 
> An unhandled exception of type 'System.Net.Mail.SmtpException'
>  occurred in System.dll
> 
> 
> Additional information: 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
> 
> 
> 

While I tried with two different gmails accounts, same error, I am certain that password is correct. When I change the port to 465 I get this error :

> 
> An unhandled exception of type 'System.Net.Mail.SmtpException'
>  occurred in System.dll
>  Additional Information: The operation timeout expired.
> 
> 
> 

I got to setting Timeout to 10000, 20000, and even 100000 and still nothing !

Please help thanks !