OK. I am
now officially confused, I was under the impression email address were not case
sensitive. But this morning one of my users got a NDR when sending an email to
someone locally on the same exchange 2010 box. She sent the email by typing the
email address and not selecting it from the GAL. She then tried to send herself
an email using all lower case in the email address and got this NDR:<o:p></o:p>
Delivery
has failed to these recipients or groups:<o:p></o:p>
jperez@xxxxtechnology.com.
The format of the e-mail address isn't correct. A correct address looks like
this: someone@example.com.
Please check the recipient's e-mail address and try to resend the message.
Diagnostic information for administrators:<o:p></o:p>
Generating
server: EXCHANGE.xxxxtechnology.com<o:p></o:p>
jperez@xxxxtechnology.com.
#550 5.1.3 STOREDRV.Submit; invalid recipient address #SMTP#<o:p></o:p>
Original
message headers:<o:p></o:p>
Received:
from EXCHANGE.xxxxtechnology.com ([fe80::6197:8c5a:64ff:868a]) by
EXCHANGE.xxxxtechnology.com ([fe80::6197:8c5a:64ff:868a%11]) with mapi id
14.02.0318.004; Mon, 29 Oct 2012 09:01:53 -0700
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: "Perez, Janice" <JPerez@xxxxtechnology.com>
To: "jperez@xxxxtechnology.com."
<jperez@xxxxtechnology.com.>
Subject: test
Thread-Topic: test
Thread-Index: Ac2174RI74/wUP7nQ2+08V8lHbZ5Pw==
Date: Mon, 29 Oct 2012 09:01:52 -0700
Message-ID: <C0C2FB92F569794E896C18626704015911A51D79@EXCHANGE.xxxxtechnology.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator: <C0C2FB92F569794E896C18626704015911A51D79@EXCHANGE.xxxxtechnology.com>
MIME-Version: 1.0
X-Originating-IP: [172.16.100.117]<o:p></o:p>
When users
are setup in AD the syntax is to do CCuser
this in turn generated an email address of CCuser@domain.
We have been doing it that way ever since NT4 and Exchange 5.5 and it never was
an issue. But now that we have Exchange 2010 (upgraded from Exchange 2003) it
seems to be a problem. Not that it should matter but the domain controllers are
still 2003.<o:p></o:p>
Any ideas
on how to fix this?<o:p></o:p>
By the way
this issue only appears to be a problem for local delivery. Someone sending
from outside can send to either uppercase or lowercase email addresses. <o:p></o:p>
Regards,<o:p></o:p>
John<o:p></o:p>