DSN: Return receipt ??

Remco Barendse mailscanner at BARENDSE.TO
Thu Jul 3 20:14:57 IST 2003

If your users are on Outlook 2000 too there is no way to disable the DSN
messages (both read/unread and successfully delivered etc).

It's only possible to do this in Outlook 2000 if you are using it in
'internet mode' where it is simply popping mail from the exchange server
and sending via smtp. If you are using Workgroup mode (or whatever it's
called) than the option to disable DSN is not available.

This caused me several headaches. MicroGarden Outlook Tools (free app,
google is your friend) was only filtering half the crap.

I think Julian had a look at the annoying, privacy invading, DSN messages
from Exchange/Outlook but it never made it into MailScanner itself.
Anyways the read receipts can be efficiently killed off using sendmail
rules although this also blocks incoming DSN messages if you are using

I can post the sendmail rules to filter the crap if interested.

The successfully delivered stuff can be killed from within Exchange (at
least in 99% of the cases) using the tick box in the earlier mail.

On Thu, 3 Jul 2003, Kevin Miller wrote:

> Ah - after chewing on your reply for a couple minutes I think you hit the
> nail on the head.  It's the client that's doing it, not Exchange.  We're
> using Exange 5.5 & LookOut 2000, so we're a bit behind you version wise, but
> I just checked my client and turned off automatic processing of requests &
> responses on arrival.  It would make sense that the client is where the
> reply would generate from, not the server as the server may not know when
> the message is actually read - just when it's retrieved.
> So I guess egress filtering on auto-replies is the only practical option
> unless you force all users to use a stock client profile where the
> auto-replies have been disabled.  Not sure if the best place to filter is in
> Sendmail or MailScanner - to new to both to make an intelligent guess, but
> maybe others here can chime in...
> ...Kevin
> -------------------
> Kevin Miller                Registered Linux User No: 307357
> CBJ MIS Dept.               Network Systems Administrator, Mail
> Administrator
> 155 South Seward Street     ph: (907) 586-0242
> Juneau, Alaska 99801        fax: (907 586-4500
> >-----Original Message-----
> >From: Remco Barendse [mailto:mailscanner at barendse.to]
> >Sent: Thursday, July 03, 2003 12:07 AM
> >To: MailScanner mailing list
> >Cc: Kevin Miller
> >Subject: Re: DSN: Return receipt ??
> >
> >
> >Tried that already, i think (suspect!) that the only thing
> >that that tab
> >kills are the messages : "Your message has been successfully
> >delivered to"
> >for most (certainly not all, see the status reply because of which I
> >started this thread) messages.
> >
> >There is absolutely no way to disable read/not read messages,
> >at least not
> >when your clients on Exchange are running Outlook 2000. Outlook XP
> >supposedly has an option to disable this 'feature'. I even tried
> >installing Microgarden Outlook Tools for Outlook 2000 but this
> >only helped
> >for about half of the messages received, for the other half
> >Outlook was
> >still happily reporting which e-mail went where and who read it.
> >
> >This is why I chose to kill the messages of based on subject
> >headers. Even
> >if the client could disable it I don't want to rely on my
> >users to disable
> >this feature to prevent leaking any information. I don't want
> >anybody to
> >know when my users read their e-mail, it's kind of embarrasing if a
> >scretary says someone is out of office but they get a read
> >receipt message
> >a couple of minutes later on an e-mail they sent.
> >
> >I just checked my maillog after setting the options
> >define(`confPRIVACY_FLAGS',
> >`authwarnings,goaway,noreceipts,restrictqrun,restrictexpand')dnl
> >
> >in my sendmail.mc but I still see read/not read messages being
> >discarded.
> >
> >I hope that this line in sendmail.mc does kill the last of the
> >annoying
> >successfully delivered/could not be delivered to messages.

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