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How can I
change the SMTP banner seen when
connecting to my Exchange server via
Telnet?
MS KB article
281224 has more:
When you use Telnet to
connect to the Simple Mail Transfer
Protocol (SMTP) service of a Windows
2000/2003-based server (regardless of
whether it is running Exchange
2000/2003), the following banner is
displayed:
Note: The SMTP
banner has another function. Read Remote
Version Checking through
SMTP/POP3/IMAP4.
Note: You may also
want to Change the IMAP4 Banner or
Change the POP3 Banner.
Warning: If you
use the ADSI Edit snap-in, the LDP
utility, or any other LDAP version 3
client, and you incorrectly modify the
attributes of Active Directory objects,
you can cause serious problems. These
problems may require you to reinstall
Microsoft Windows 2000/2003 Server,
Microsoft Exchange 2000/2003 Server, or
both. Microsoft cannot guarantee that
problems that occur if you incorrectly
modify Active Directory object
attributes can be solved. Modify these
attributes at your own risk.
This may be an issue if
you do not want the version of the SMTP
service that is running on your server
to be displayed. To remove the version
information from the Windows 2000/2003
SMTP banner, follow these steps:
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Using a metabase
editing tool such as MetaEdit or
Metabase Explorer,
locate the following file:
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Click Edit, click
New, and then click String.
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Verify that the entry
in the ID box is Other, and then
type 36907 (decimal) on the right
side of the ID box.
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In the Data box, type
the banner that you want to be
displayed.
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Stop, and then
restart the SMTP virtual server or
the SMTP service.
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To confirm that the
banner has been changed, telnet to
port 25 of the virtual server (the
default setting). The "ESMTP MAIL
Service, Version: 5.0.2195.1600"
banner should no longer be
displayed.
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