problem with mail address case

[f immenroth]

Hello,
 
we have a Problem with our MailScanner / Postfix system.
When I send a mail to T1485 at domain.com the address will be changed
after processing to t1485 at domain.com .
Since the receiving system is requesting case sensitive addresses (and
so defined in RFC) what have i to change for not rewriting the mail
addresses?
 
Thank you
 
Florian
 
Log-Output:
Jun  7 08:24:35 mailproxy postfix/cleanup[24006]: C5226107EF9: hold:
header Received: from groupwise.skbs.de (groupwise2.serverskbs.de
[192.168.12.169])??by mailproxy.serverskbs.de (Postfix) with ESMTP id
C5226107EF9??for <T1485 at oscar.klinikum-braunschweig.de>; Fri,  7 Jun 20
from groupwise2.serverskbs.de[192.168.12.169];
from=<f.immenroth at klinikum-braunschweig.de>
to=<T1485 at oscar.klinikum-braunschweig.de> proto=ESMTP
helo=<groupwise.skbs.de>
Jun  7 08:24:35 mailproxy postfix/cleanup[24006]: C5226107EF9:
message-id=<51B198C20200007D00037F85 at groupwise.skbs.de>
Jun  7 08:24:35 mailproxy postfix/smtpd[24004]: disconnect from
groupwise2.serverskbs.de[192.168.12.169]
Jun  7 08:24:40 mailproxy MailScanner[24012]: New Batch: Scanning 1
messages, 1433 bytes
Jun  7 08:24:40 mailproxy MailScanner[24012]: Filename Checks: Allowing
C5226107EF9.AA8A5 msg-24012-1.txt
Jun  7 08:24:41 mailproxy MailScanner[24012]: Filetype Checks: Allowing
C5226107EF9.AA8A5 msg-24012-1.txt (no match found)
Jun  7 08:24:41 mailproxy MailScanner[24012]: Virus and Content
Scanning: Starting
Jun  7 08:24:41 mailproxy MailScanner[24012]: Virus Scanning completed
at 2563 bytes per second
Jun  7 08:24:41 mailproxy MailScanner[24012]: Spam Checks: Starting
Jun  7 08:24:41 mailproxy MailScanner[24012]: Message C5226107EF9.AA8A5
from 192.168.12.169 (f.immenroth at klinikum-braunschweig.de) is
whitelisted
Jun  7 08:24:41 mailproxy MailScanner[24012]: Spam Checks completed at
616898 bytes per second
Jun  7 08:24:41 mailproxy MailScanner[24012]: Requeue:
C5226107EF9.AA8A5 to 97AA1107F06
Jun  7 08:24:41 mailproxy postfix/qmgr[5855]: 97AA1107F06:
from=<f.immenroth at klinikum-braunschweig.de>, size=603, nrcpt=1 (queue
active)
Jun  7 08:24:41 mailproxy MailScanner[24012]: Uninfected: Delivered 1
messages
Jun  7 08:24:41 mailproxy MailScanner[24012]: Virus Processing
completed at 176088 bytes per second
Jun  7 08:24:41 mailproxy MailScanner[24012]: Deleted 1 messages from
processing-database
Jun  7 08:24:41 mailproxy MailScanner[24012]: Batch completed at 2404
bytes per second (1433 / 0)
Jun  7 08:24:41 mailproxy MailScanner[24012]: Batch (1 message)
processed in 0.60 seconds
Jun  7 08:24:41 mailproxy postfix/smtp[24026]: 97AA1107F06:
to=<t1485 at oscar.klinikum-braunschweig.de>,
relay=172.16.60.75[172.16.60.75]:25, delay=5.8, delays=5.7/0/0.01/0.02,
dsn=5.0.0, status=bounced (host 172.16.60.75[172.16.60.75] said: 553
Requested action not taken: mailbox name not allowed (in reply to RCPT
TO command))
Jun  7 08:24:41 mailproxy MailScanner[24012]: Logging message
C5226107EF9.AA8A5 to SQL
Jun  7 08:24:41 mailproxy MailScanner[24015]: C5226107EF9.AA8A5: Logged
to MailWatch SQL
Jun  7 08:24:41 mailproxy postfix/cleanup[24006]: 89149107EF9:
message-id=<20130607062441.89149107EF9 at mailproxy.serverskbs.de>
Jun  7 08:24:41 mailproxy MailScanner[24012]: "Always Looked Up Last"
took 0.01 seconds
Jun  7 08:24:41 mailproxy postfix/qmgr[5855]: 89149107EF9: from=<>,
size=3064, nrcpt=1 (queue active)
Jun  7 08:24:41 mailproxy postfix/bounce[24129]: 97AA1107F06: sender
non-delivery notification: 89149107EF9
Jun  7 08:24:41 mailproxy postfix/qmgr[5855]: 97AA1107F06: removed
Jun  7 08:24:41 mailproxy postfix/smtp[24026]: 89149107EF9:
to=<f.immenroth at klinikum-braunschweig.de>,
relay=192.168.12.169[192.168.12.169]:25, delay=0.03,
delays=0.02/0/0/0.01, dsn=2.0.0, status=sent (250 Ok)
Jun  7 08:24:41 mailproxy postfix/qmgr[5855]: 89149107EF9: removed

Städtisches Klinikum Braunschweig gGmbH
Freisestr. 9/10,  38118 Braunschweig
Geschäftsführer: Dipl.-Kfm. Helmut Schüttig
Aufsichtsrat: Ulrich Markurth, Vorsitzender
Amtsgericht Braunschweig, HRB 9319
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