Re: E-mails in my Outgoing Queue with sender <>

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: George (george_at_theisgroup.net)
Date: 02/08/04 

Date: Sun, 8 Feb 2004 06:20:26 -0800

Craig,

This does not answer WHY the NDR's are being generated. If the relay is in
fact closed and authenticated relaying is disabled why are the ndr's being
generated. These must be emails that are coming into the system that have
invalid recipients and the system is attempting to notify sender.

Is there a way to prevent the NDR's from being generated for this reason?
And is there a way to determine exactly WHY a particular NDR is being
generated?
And once that determination is made how would you go about preventing the
NDR?

Thanks

g
"Craig Philbeck [MSFT]" <a-cphil@online.microsoft.com> wrote in message
news:OOETaUL7DHA.2460@TK2MSFTNGP09.phx.gbl...
> Hi Shannon,
>
> The messages with sender of <> are system messages, most likely ndr's
being
> sent by your server back to the "original" sender. You can open the
> messages in notepad and see the header information. You will find the
> message files in the imcdata\out folder on the hard drive.
>
> You mention that you are secure against relay but then say you allow
> authenticated users to send mail. This is not secure. It is better to
> switch pop3 users to OWA than allowing authenticated relay.
>
> Craig
>
> --
> Craig Philbeck
> a-cphil@online.microsoft.com
> Microsoft PSS
>
> Please do not send email directly to this alias. This alias is for
> newsgroup purposes only.
>
> This posting is provided "AS IS" with no warranties, and confers no
rights.
> "Shannon Scheer" <shannon@cybertram.com> wrote in message
> news:44779ee1.0402051815.730e3c4d@posting.google.com...
> > I am running Nt4 Sp 6a with Exchange 5.5. My server is secure against
> > relay, only users who authenticate can send mail. I have also done the
> > registry hack telling the Exchange server to suppress sending delivery
> > reports.
> >
> > however whn I go into my Exchange Admin and look at the outgoing Queue
> > I am seeing alot of message awaiting delivery (usually because the
> > mail boxes are reporting full at the receivers end) but most of the
> > mail that is there have no senders attached. Under Originator it just
> > says <>.
> >
> > Is there some way I can go look at the piece of mail that is awaiting
> > delivery? And is this some other form of relaying and if so how do I
> > stop it?
> >
> >
> > Thanks
> >
> > Shannon Scheer
>
>

Relevant Pages

  • Re: SMTP Exchange 2k relay authentication
    ... > NB THERE IS NO USERNAME OR PASSWORD SUPPLIED AND YET IT IS ... >>Exchange will only deny relay after accepting the ... > that Exchange is authenticating the session without any ... > You wont be rejected and the test did authenticate without ...
    (microsoft.public.exchange2000.setup.installation)
  • Re: SMTP Exchange 2k relay authentication
    ... NB THERE IS NO USERNAME OR PASSWORD SUPPLIED AND YET IT IS ... >Exchange will only deny relay after accepting the ... that Exchange is authenticating the session without any ... You wont be rejected and the test did authenticate without ...
    (microsoft.public.exchange2000.setup.installation)
  • Re: restrict from address
    ... in the respect that anyone who can authenticate against the server can drop ... The fact that anyone with a domain account can ... authenticate and relay might be a problem in a higher-security environment ...
    (microsoft.public.exchange.admin)
  • Re: Strange email traffic
    ... It's possible that someone is using a username and password to authenticate, ... that would allow them to relay. ... Stop then restart the IMS ... Disable all "Guest" accounts ...
    (microsoft.public.exchange.admin)