v-stezhu
Tue Jun 13 03:24:40 CDT 2006
Hi,
Thanks for posting here.
From the error code 5.5.0 in the NDR message in your post, it indicates a
generic SMTP protocol error. Usually this error is caused by the
destination mail server drops the SMTP connection from the client
unexpectedly. So to further narrow down this issue, let''s run the telnet
command from the client directly to connect to your Exchange server (by
using your server''s FQDN name but not IP address), and then check if it''s
also failed and how and why the mail server drops the connections.
For more information about how to use telnet command to send test e-mail,
please refer to the following Knowledge Base (KB) article:
153119.KB.EN-US XFOR: Telnet to Port 25 to Test SMTP Communication
http://support.microsoft.com/default.aspx?scid=KB;EN-US;153119
If the telnet connection is dropped by your Exchange server, please check
if there is restriction for sender on the Exchange server.
1. Click "Start", point to "Programs", point to "Microsoft Exchange", and
then click "System Manager".
2. Expand "Global Settings", right-click "Message Delivery", and then click
"Properties".
3. Click the "Sender Filtering" tab, and remove the block settings.
I hope the above information helps.
Have a nice day.
Best Regards,
Steven Zhu
MCSE
Microsoft Online Partner Support
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