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I have a client that sometimes we cannot receive his emails from<br />
it happens when he includes other email Recipients, the email usually just has a link and is addressed to no more than 25 others. I have many other clients that can send us bulk emails over 25 with links and attachments up to 15mbs and it's not a problem<br />
We use Symantics.clould service for spam filtering, I just called thier support and they tell me the rejection is coming from our email server not their filters <br />
<br />
the error is:<br />
Diagnostic information for administrators:<br />
&nbsp;<br />
Generating server: server-17.bemta-7.messagel<wbr />abs.com<br />
&nbsp;<br />
user@company.com<br />
mail.company.com #&lt;mail.company.com #5.0.0 smtp; 550 Administrative prohibition&gt; #SMTP#<br />
<br />
any suggestions where I can look?
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I have a client that sometimes we cannot receive his emails from
it happens when he includes other email Recipients, the email usually just has a link and is addressed to no more than 25 others. I have many other clients that can send us bulk emails over 25 with links and attachments up to 15mbs and it's not a problem
We use Symantics.clould service for spam filtering, I just called thier support and they tell me the rejection is coming from our email server not their filters 

the error is:
Diagnostic information for administrators:
 
Generating server: server-17.bemta-7.messagelabs.com
 
user@company.com
mail.company.com #<mail.company.com #5.0.0 smtp; 550 Administrative prohibition> #SMTP#

any suggestions where I can look?

5.0.0 smtp; 550 Administrative prohibition

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).

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).