a chevalier

Hi,

I am writing a .NET application that sends out emails to external
company through Exchange Server. These emails are sent out with
Delivery Notification requests for us to check later on.

I am trying to cross check this delivery status programmatically by
querying the Exchange Store using WebDAV. However, I cannot seem to
find enough information in the WebDAV results to be able to determine
which outgoing email the delivery receipt is acknowledging; Especially
in the case where several emails have been sent to one particular email
address.

As different mail server generates different format of Delivery Status
Notification responses, this problem does not apply to all server. For
example, some server will return the original email subject. In this
case, I can put unique ID as part of the subject to be able to cross
check the DSN. But some server do not return the original subject.

However, I would rather go for a more "proper" stable field in the
WebDAV result if there is one.

Has anyone tried to do something similar to this? Any suggestions?

Thank you.

henning krause mvp - exchange

Hello,

well, DSN messages are standardized (well, sort of):
http://www.cse.ohio-state.edu/cgi-bin/rfc/rfc1891.html

However, Exchange modifies incoming DSNs to make them more "readable". You
can find more on this topic at http://www.m***changefaq.de/internet/ndr.htm
(German only, you could try Google Translations or Altavista Babelfish).

Especially, the following part might be of interest for you, as it disables
the modifications done to DSN messages. You need to change a registry. But
be aware, that this will effect the entire server!

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\M***changeIS\ParametersSystem\InternetContent]
"RenderDSNsAsMessages"=dword:00000001

Best regards,
Henning Krause