AW: MS Exchange delivery notifications

Bolmerg-Berliner Ludger - Munich-MR
Thu Jan 23 11:24:35 UTC 2003

Using a whitelist does not really help.  The delivery notifications are
coming from various mail hosts.  There are obviously lots of MS Exchange
system out on the net.  env_From is always empty.  mail_host is always
empty, I do not know why this is the case.  Here is an example of a logged

	DATE: 01/22/03 11:24:29 CET
	IP: ::ffff:
	env_From: <>  mail_host=

There are a bunch of different delivery messages from different mail hosts
with the same Fuz2 checksum.  But this does not seem to be a rule.  So
adding the checksum to the whitelist will not solve the issue.


-----Ursprüngliche Nachricht-----
Von: Sven []
Gesendet: Mittwoch, 22. Januar 2003 14:37
Betreff: Re: MS Exchange delivery notifications

----- Original Message -----
From: "Bolmerg-Berliner Ludger - Munich-MR" <>
To: <>
Sent: Wednesday, January 22, 2003 7:45 AM
Subject: MS Exchange delivery notifications

> Hi,
> I am experiencing a problem receiving MS Exchange delivery notifications.
> The fuz2 checksum calculated for these messages seems always to be
> but has a count that forces the message to be rejected.
> Does anybody have an idea for a workaround?

Use a whitelist. The delivery notifications, do they have a consistent
"From" line or do they come from a consistent mail host or two? Whitelisting
the env_from or mail_host may be the way to go ...


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