A Simple question about sending emails

Hi,

I still didn't figure it out how to send emails from my website that is hosted in IIS7.

I'm an experienced .NET developer, so, I'll cut to the chase


If I use:

smtp.Host = "64.79.170.132";
smtp.Port = 25;
smtp.EnableSsl = false;

it seams that I can only send emails to any username that exists in my mailbox as I get an error saying that the email I'm trying to send, does not exist in this server (this as the SMTP server)

If I use:

smtp.Host = "64.79.170.132";
smtp.Port = 25;
smtp.EnableSsl = false;
smtp.Credentials = new NetworkCredential("[email protected]", "mypassword");

being "[email protected]" a user created in the http://64.79.170.132


or smtp port number 587, I do not get any exception, but the email never reaches the destination.

What can I do to debug/find out how can I send emails from my application to persons?

I am sending emails acting on Spam rules, so, no worries there.