Article: Q254725
Product(s): Microsoft Exchange
Version(s): winnt:5.5 SP3
Operating System(s):
Keyword(s): exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix
Last Modified: 11-NOV-2000
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The information in this article applies to:
- Microsoft Exchange Server, version 5.5 SP3
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SYMPTOMS
========
If you send a message to an X.400 address similar to the following, you may
receive a non-delivery report (NDR):
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first(u)last@domain.com
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first_last(a)domain.com
CAUSE
=====
This issue can occur if the Tracking.log file contains addresses similar to the
following:
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first(040)u(041)last@domain.com
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first(u)last(040)a(041)domain.com
The Exchange Server message transfer agent (MTA) generates NDRs because of the
(040) and (041) in the address. The following characters,
- a
- b
- p
- q
- u
- r
- l
are recognized as printable representations of non-printable character
substitutions when inside of parenthesis. For example, the (a) can be used to
represent the non-printable character @. The combination of the printable and
non-printable character representations creates an address that is difficult to
resolve.
RESOLUTION
==========
To resolve this problem, obtain the latest service pack for Exchange Server 5.5.
For additional information, please see the following article in the Microsoft
Knowledge Base:
Q191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack
WORKAROUND
==========
To work around this issue, manually rewrite the address so that it does not
include both printable and non-printable characters.
STATUS
======
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5 Service Pack 3. This problem was first corrected in Exchange Server
5.5 Service Pack 4.
MORE INFORMATION
================
Note that messages sent to addresses similar to the following are handled
correctly:
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first_last@domain.com
- C=FR;a=ATLAS;p=INTERNET;DDA:RFC-822=first(u)last(a)domain.com
Additional query words: unicode non-printable
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Keywords : exc55sp3 kbExchange550preSP4fix kbExchange550sp4Fix
Technology : kbExchangeSearch kbZNotKeyword2 kbExchange550SP3
Version : winnt:5.5 SP3
Issue type : kbbug
Solution Type : kbfix
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