Walkthrough de MSDN - Creating a Web Site with Membership and User Login

[Jacs]

Hi,
I tried that walkthrough, and found it very interesting until I had to
use the recovery password feature which uses the SMTP mail service.
That part of the application uses the ASP.NET Configuration command in
the Website menu. One is told to configure the SMTP e-mail settings.
There is not much information about this in the walkthrough. I would
appreciate some help about this problem.
I use VS2010, the .NET Framework 4, and Windows 7.
For the SMTP settings, I used my computer name as the server name. Is
that ok?
The port is 25 by default. Is that correct?
In the From:, I entered my email address.
For the authentication, I tried two of the three options, None, and
NTLM (Windows authentication).
No matter what I try, I always get the same error message:
Exception Details: System.Net.Sockets.SocketException: Aucune
connexion n’a pu être établie car l’ordinateur cible l’a expressément
refusée [2001:0:4137:9e76:188d:a6f:3f57:fdf5]:25
That means: No connection could be established because the destination
computer rejected it.
I wander what is wrong. I would like to know where to get some
information about that problem.
I know that other people have encountered the same problem and never
found any solution. I would like to change that.
Another question: how do I know that somone has answered my post?
Thanks in advance.
Jacs