BLOBs and 504 XEXCH50 errors

[Zev]

I continue to get rejected SMTP seesions from external exchange servers.
Apparently this has to do with my firewall blocking BLOBs/XEXCH50 commands.
How or what do I need to do in order to allow this traffic to pass freely to
my Exchange server?

Exchange 2003 Ent Ed Sp1
Windows 2003 Server

thanks,

Zev

[Matt Kuzior [MSFT]]

The following article will be useful
http://support.microsoft.com/default.aspx?scid=kb;en-us;843106

This discusses ways for the remote org to handle exch50 communication to
your org.

Your second option is to update your firewall software. Later versions of
ISA server handle the Exch50 command.

Your final option is to disable the Exch50 sink on your side. You should
only consider this if your receiving server is acting a Gateway server and
does not handle intraorg traffic between other Exchange servers. Since the
full effect is not documented and this configuration is not supported, you
should thoroughly test this before deploying.

To disable Exch50 on your server use the following steps:
C:\>cd "Program Files\Exchsrvr\bin"
C:\Program Files\Exchsrvr\bin>regsvr32 /u peexch50.dll
C:\Program Files\Exchsrvr\bin>iisreset

You can confirm EXCH50 is disabled by using "telnet localhost 25"
Issue the command, "ehlo anydomain"
Observere that "250-XEXCH50" no longer appears in the ehlo response.

Note: to reenable the EXCH50 sink ussue the command "regsvr32 peexch50.dll"

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"Zev" <Z...@zev.zev> wrote in message
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[Zev]

Matt,

Finally, unregistering the .DLL has solved my problems.

many thanks,

Zev

"Matt Kuzior [MSFT]" <mat...@online.microsoft.com> wrote in message
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