Re: How to disable CHUNKING/BDAT on a standalone window 2000 SMTP server?

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Change the smtpInboundCommandSupportOptions value in IIS metabase using
adsutil.vbs or Metabase Explorer.

IIS 6.0 Metabase Property Reference
http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/fa9dd1ae-34dc-4f45-b32b-c20ba0ec0c48.mspx?mfr=true

(Haven't found IIS 5.0/Windows 2000-specific link, but I suspect this works)

Chunking has a decimal value of 1048576.

Another article, though Exchange-specific, talks about modifying this
property in IIS Metabase... which should fill in the gaps from the IIS
Reference link above.
http://support.microsoft.com/kb/257569/
--
Bharat Suneja
MVP - Exchange
www.zenprise.com
NEW blog location:
www.exchangepedia.com/blog
----------------------------------------------


"Barney" <danielxdwang@xxxxxxxxx> wrote in message
news:1157750093.250557.275590@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
We use a standalone SMTP server as our mail gateway. After we upgraded
to Cisco's ASA5500 (PIX upgrade), we started having trouble with
certain outside Exchange servers. It turned out Cisco's SMTP inspection
engine blocked the BDAT command when our server used it to send data
out. The problem is, however, Cisco doesn't block the SMTP chunking
advertisement from the receiving server, so our server always tried to
use BDAT as opposed to DATA.

There is no fix right now on the ASA to block SMTP verb advertisement.
And I don't want to turn off SMTP inspection for too long.

MS only provids How-to on disabling SMTP verbs on Active Directory
enabled Exchange server. There is a disabling 8bitMIME doc on standard
2000 SMTP server, but not for Chunking.

Does anyone know of a way to do that? Any VB script to do that?

Another solutino someone suggested in this group is to dumb down my
SMTP server to basic SMTP commands. I don't like it because with all
the SPAM filters, my SMTP is slow enough already.

Thanks for any suggestions in advance.



.

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