<div>
<div class="content wysiwyg-content">
Hi All<br />
<br />
I have a client who is expecting an email from an automated 3rd party system however the 3rd party receives the following bounce back when trying to email my client<br />
<br />
&quot;#5.5.0 smtp;550 &lt;noreply@online-training.p<wbr />olypipe.co<wbr />m&gt;: Sender address rejected: Domain not found&gt;&quot;<br />
<br />
My client is able to receive email from all other external senders.<br />
<br />
Any ideas why they are receiving the bounce back.<br />
<br />
My clients sbs server is configured to use the pop3 connector<br />
<br />
Thanks
</div>
</div>


Hi All

I have a client who is expecting an email from an automated 3rd party system however the 3rd party receives the following bounce back when trying to email my client

"#5.5.0 smtp;550 <noreply@online-training.polypipe.com>: Sender address rejected: Domain not found>"

My client is able to receive email from all other external senders.

Any ideas why they are receiving the bounce back.

My clients sbs server is configured to use the pop3 connector

Thanks

SBS 2008 Email Issue - smtp 550

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.

Exchange

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).