DSN setup - ReadList.com

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DSN setup
\ Ed (14 Jun 2007)
. \ Ed (14 Jun 2007)
. . \ Rick Zeman (15 Jun 2007)
. . . \ Ed (15 Jun 2007)
. . . . \ Sandy Drobic (15 Jun 2007)
. . . . . \ Ed (16 Jun 2007)
. . . . . . \ Sandy Drobic (16 Jun 2007)

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Subject:	DSN setup
Group:	Postfix-users
From:	Ed
Date:	14 Jun 2007

Dear Postfix gurus,
I have a client who would like the equivalent of 'return receipts' for his
mails.

I have setup postfix and have found that DSN might do the job but the
documentation is limited and I just can't seem to get it working.

All I found was this: http://www.postfix.org/DSN_README.html

What I did was:
{
# cat /etc/postfix/esmtp_access
192.168.1.0/24 silent-discard
0.0.0.0/0 silent-discard, dsn
::/0 silent-discard, dsn

# cat /etc/postfix/main.cf
smtpd_discard_ehlo_keyword_address_maps = cidr:/etc/postfix/esmtp_access
}

Am I right in thinking users will get an email saying their mail was
delivered?

Does anyone have a working example?

... do any windows mail client handle DSN that you know?

Pointers to documentation are always welcome :)

Thanks all,
-Ed