<div>
Are you sure you are not openly relaying mail?<br />
<br />
Check at the following url; <br />
<br />
<a href="http://www.abuse.net/relay.html" rel="ugc">http://www.abuse.net/relay.html</a><br />
<br />
Let us know the result<br />
<br />
Adam
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NO &nbsp;i am sure , my server is not open relay<br />

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Can you turn on As much logging on the SMTP Virtual Server as possible and try again.<br />
<br />
Once you've done, disable logging and submit the log file for investigation?
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HI sorry for late reply .<br />
<br />
what do you mean by turn as much as loggin on the SMTP server ??<br />
<br />
what service shall i enable ??
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<div class="content wysiwyg-content">
Hi Some times in Event Log, i see this Error message<br />
<br />
MsExchange Transport NDR<br />
<br />
A non-delivery report with a status code 4.0.0 was generate for receipt rfc822,charmina@sisna.com ( message id &lt;sbs..................&gt;<br />
<br />
why this error message ??<br />
is this bad ??<br />
<br />
I guess, Exchange is trying to sent email to those receipt but its failed, but no body sent email to those address, so what happenning here ??
</div>
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Hi Some times in Event Log, i see this Error message

MsExchange Transport NDR

A non-delivery report with a status code 4.0.0 was generate for receipt rfc822,charmina@sisna.com ( message id <sbs..................>

why this error message ??
is this bad ??

I guess, Exchange is trying to sent email to those receipt but its failed, but no body sent email to those address, so what happenning here ??

msExchange Transport NDR

Software is any set of instructions that directs a computer to perform specific tasks or operations. Computer software consists of programs, libraries and related non-executable data (such as documentation). Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers. Software written in a machine language is known as "machine code". However, in practice, software is usually written in high-level programming languages than machine language. High-level languages are translated into machine language using a compiler or interpreter or a combination of the two.

Software

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.