503 5.5.2 Send hello first

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From: Sidney Zhang (sidneyz_at_tom.com)
Date: 03/22/05 

Date: Tue, 22 Mar 2005 11:01:34 +0800

Hi:
I got a very strange problem, we want to send some emails from a Lotus notes
email server to a newly created exchange2k3 server. (One component of Small
Business Server. )
Exchange2K3 server seems works fine, can send/receive email with most of the
email severs available on Internet.
The problem is Exchange2K3 always reject email from the Lotus notes server.
With error message:
---------------------
Error transferring to mail.PURESINO.COM; SMTP Protocol
Returned a Permanent Error 503 5.5.2 Send hello first
---------------------

Can anyone give me a hint, how can I fix it?

Thanks
Sidney

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