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501 Syntactically invalid HELO argument(s)"

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ATBCSLTD

ATBCSLTD

Technical User
Feb 9, 2002
29
GB
I have exchange 5.5 And am using ADSL to send messages via DNS. when i send messages to some pepole i get the follwoing error returned in an NDR

Unable to deliver the message due to a communications failure
MSEXCH:IMS:servername:Domain:servername 3501 (000B0981) 501 Syntactically invalid HELO argument(s)"

I can send to other people OK.

any ideas.
 
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