Jack,

Ports 465/995 are secure in Gmail. There is a free SSL library which Gmail use for their
Gmail e-mail tool. See below:

http://www.mentalis.org/soft/projects/ssocket/

There are several things here:

1) You don't need to use GMail as the relay server just because you want to
send email *to* a Gmail account...

2) What you mean by "can't archive it"? What archive are you talking
about...?

3) The MailMessage() object declaration is incorrect:
http://www.systemnetmail.com/faq/3.1.1.aspx

Here is sample working Gmail Sender code. Watch carefully at everything that
is done:

using System;
using System.Collections.Generic;
using System.Text;

namespace PAB.Utils
{
 public static class Sender
   {
       public static void SendGmail(string userName, string password,
string mailFrom,
                                string mailTo,string subject, string
message,bool isBodyHtml)
       {
       System.Net.Mail.MailMessage msg = new
System.Net.Mail.MailMessage(mailFrom,mailTo,
       subject, message);
           msg.IsBodyHtml = isBodyHtml;
       System.Net.NetworkCredential cred = new
       System.Net.NetworkCredential(userName, password);
       System.Net.Mail.SmtpClient mailClient = new
System.Net.Mail.SmtpClient("smtp.gmail.com",587);
       mailClient.EnableSsl = true;
       mailClient.UseDefaultCredentials = false;
       mailClient.Credentials = cred;
       mailClient.Send(msg);
       }
   }
}

You should not send your message to gmail directly.

Instead, use the SMTP server that belongs to your domain/internet provider.

I have a gmail example wired up (downloadable code) at:
http://sholliday.spaces.live.com/Blog/cns!A68482B9628A842A!138.entry