Possible to configure SMTP to refuse relaying certains e-addresses

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

I'm using an IIS SMTP inside a Win Serv 2003 Web Edition as a relay to
an Exchange server, using the instructions published here:
http://support.microsoft.com/default.aspx?kbid=324272

So far so good. Besides this basic configuration, I'd like to go a bit
further. Actually, I see that some spams are sent to invalid e-addresses
(due to users gone) with the following apparent consequences:
1. spams are placed in badmails.
2. a mail is sent back to the sender. If such sender doesn't exist, the
mail is rebounced back.

With the enormous quantities of spams, these are really additional
waste of bandwidth. So I would rather like the SMTP server refuses these
invalid e-addresses. I've looked through everywhere but still can't find
anything close to what I want. Did I miss something or is it just impossible?

.

Relevant Pages

  • purpose of IIS SMTP?
    ... I used to work in a big company that used Exchange Server. ... I stumbled across IIS SMTP ... like that their Outlook or Outlook Express could tap into the IIS SMTP ... outgoing mails with Outlook and Outlook Express, so I don't think I need the ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: purpose of IIS SMTP?
    ... > I used to work in a big company that used Exchange Server. ... I stumbled across IIS SMTP ... > like that their Outlook or Outlook Express could tap into the IIS SMTP ... > outgoing mails with Outlook and Outlook Express, so I don't think I need ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: email in queue folder
    ... but my Exchange server already setup will delete ... >receptions which not in AD, so it should delete these emails, not reject ... IIS SMTP gateway doesnt have this capability however, ...
    (microsoft.public.exchange.admin)
  • Re: email in queue folder
    ... >>I use IIS SMTP for my SMTP gateway, and all email will forward to my ... but my Exchange server already setup will delete ... >>receptions which not in AD, so it should delete these emails, not reject ...
    (microsoft.public.exchange.admin)
  • Re: stopping spam
    ... > I have just found out that my exchange server is sending out spams. ... SMTP authentication is a) enabled by default in E2k/E2003 and b) won't ... mention your version of Exchange when posting in here... ...
    (microsoft.public.exchange.admin)