Outgoing SMTP error: NDR 5.3.5 (Full Version)

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pcdf -> Outgoing SMTP error: NDR 5.3.5 (29.Nov.2007 11:20:40 AM)

Hi there,
I've just uninstalled Trend Micro VirusWall which used to scan port 25 and redirect everything to port 6000 for exchange to pick it up.
After having uninstalled it I set Exchange listening port back to 25 and we can receive email alright. However when we try to send external emails we get the following error:

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.


Reporting-MTA: dns;domain.co.uk
Received-From-MTA: dns;[xxx.x.x.x]
Arrival-Date: Thu, 29 Nov 2007 16:01:59 +0000

Final-Recipient: rfc822;sender@domain.co.uk
Action: failed
Status: 5.3.5

I've looked this up and it's apparently looping back to itself.
I've tried deleting the SMTP connector as suggested in http://support.microsoft.com/default.aspx?scid=kb;en-us;316617 but it's not worked. I've only got one virtual SMTP server so port sharing shouldn't be an issue...
Can anyone help? Any ideas would be most appreciated?
BTW, I use Windows server 2000 and Exchange 2000.
Thanks in advance.

John Weber -> RE: Outgoing SMTP error: NDR 5.3.5 (29.Nov.2007 12:09:17 PM)

This is the wrong forum for this as this forum is e2k7.

However, have you checked your smarthost setting?


pcdf -> RE: Outgoing SMTP error: NDR 5.3.5 (30.Nov.2007 6:37:27 AM)

Sorry, I didn't realised I posted this to the wrong forum.
Still not working btw.

rishishah -> RE: Outgoing SMTP error: NDR 5.3.5 (30.Nov.2007 6:42:56 AM)

Good point made by John...there is a very high chance that your smarthost for delivery is still set to the Trend Micro 

pcdf -> RE: Outgoing SMTP error: NDR 5.3.5 (30.Nov.2007 7:11:10 AM)

Thanks you guys, the was really with the smarthost that was sending to itselft for trend to pick it up. Rookie mistake.
Thanks again for your help. Most appreciated! :-) 

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