exchange server

i have a lot of errore in event viewer on my exchange server the errore event is in the application tab and is like this "This is an SMTP protocol warning log for virtual server ID 1, connection #29395. The remote host "207.71.250.233", responded to the SMTP command "mail" with "452 4.3.1 Out of memory  ". The full command sent was "MAIL FROM:<>  ".  This may cause the connection to fail. "
what this mean and how can i resolve this?
buildingitAsked:
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redseatechnologiesCommented:
Is it all the same IP address?

That sounds like a problem at the receiving end, and moreso, probably an NDR - probably to spam

Do you have exchange 2003?  If so, I would be implementing recipient filtering and tarpitting -> http://www.amset.info/exchange/filterunknown.asp

If not, then I would be looking at something like GFI or Vamsoft to do the same thing

-red
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buildingitAuthor Commented:
not the same ip address and yes its exchange 2003
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redseatechnologiesCommented:
I get exactly the same error from that domain - which means it isn't your problem.

Implement recipient filtering and tarpitting as per the above link.

On another note, does the domain pbrealtors.com mean anything to you?
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