title: SSRS Subscription to an email group (distribution list) is not working
body: <p>In SSRS, a subscription for email IDs is working properl,y but for a group email ID it's showing following message:</p>
  
  <blockquote>
    <p>Delivery has failed to these recipients or groups:</p>
    
    <p>Group Team (groupTeam@company.com) Your message can't be delivered
    because delivery to this address is restricted.</p>
    
    <p>Diagnostic information for administrators:</p>
    
    <p>Generating server: CR-EX2010-CAS01.domain.ad.company.com</p>
    
    <p>groupTeam@company.com #550 5.7.1 RESOLVER.RST.AuthRequired;
    authentication required ##</p>
  </blockquote>
  
  <p>Original message headers:</p>
  
  <blockquote>
    <p>Received: from MachineName (1X.6X.1XX.2XX) by 
    CR-EX2010-CAS01.domain.ad.company.com (1X.6X.1XX.1XX) with Microsoft
    SMTP Server  id 14.2.342.3; Tue, 18 Jun 2013 12:10:10 +0000
    Thread-Topic: TestEmailGroup_Local was executed at 6/18/2013 5:40:06
    PM Local Report thread-index: Ac5sHMVttkcWf0iySVqJzLN2XGgn7g==
    Reply-To: From:  To: Group Team
     CC: BCC: Subject: TestEmailGroup_Local was
    executed at 6/18/2013 5:40:06 PM Local Report Date: Tue, 18 Jun 2013
    17:40:08 +0530 Message-ID:
    &lt;1D23A36E5012444DB165265B4F21BEF7@domain.ad.cmpany.com> MIME-Version:
    1.0 Content-Type: multipart/mixed;             boundary="----=_NextPart_000_0001_01CE6C4A.E079EE30"
    Content-Transfer-Encoding: 7bit X-Mailer: Microsoft CDO for Windows
    2000 Content-Class: urn:content-classes:message Importance: normal
    Priority: normal X-MimeOLE: Produced By Microsoft MimeOLE
    V6.1.7601.17609 Return-Path: myemailid@company.com</p>
  </blockquote>
  
  <p>My rsreportserver.config as follows</p>
  
  <pre><code>        &lt;Extension Name="Report Server Email" Type="Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider,ReportingServicesEmailDeliveryProvider"&gt;
              &lt;MaxRetries&gt;3&lt;/MaxRetries&gt;
              &lt;SecondsBeforeRetry&gt;900&lt;/SecondsBeforeRetry&gt;
              &lt;Configuration&gt;
                  &lt;RSEmailDPConfiguration&gt;
                      &lt;SMTPServer&gt;outlook.company.com&lt;/SMTPServer&gt;
                      &lt;SMTPServerPort&gt;&lt;/SMTPServerPort&gt;
                      &lt;SMTPAccountName&gt;&lt;/SMTPAccountName&gt;
                      &lt;SMTPConnectionTimeout&gt;&lt;/SMTPConnectionTimeout&gt;
                      &lt;SMTPServerPickupDirectory&gt;&lt;/SMTPServerPickupDirectory&gt;
                      &lt;SMTPUseSSL&gt;&lt;/SMTPUseSSL&gt;
                      &lt;SendUsing&gt;2&lt;/SendUsing&gt;
                      &lt;SMTPAuthenticate&gt;&lt;/SMTPAuthenticate&gt;
                      &lt;From&gt;myemailid@compny.com&lt;/From&gt;
                      &lt;EmbeddedRenderFormats&gt;
                          &lt;RenderingExtension&gt;MHTML&lt;/RenderingExtension&gt;
                      &lt;/EmbeddedRenderFormats&gt;
                      &lt;PrivilegedUserRenderFormats&gt;&lt;/PrivilegedUserRenderFormats&gt;
                      &lt;ExcludedRenderFormats&gt;
                          &lt;RenderingExtension&gt;HTMLOWC&lt;/RenderingExtension&gt;
                          &lt;RenderingExtension&gt;NULL&lt;/RenderingExtension&gt;
                          &lt;RenderingExtension&gt;RGDI&lt;/RenderingExtension&gt;
                      &lt;/ExcludedRenderFormats&gt;
                      &lt;SendEmailToUserAlias&gt;True&lt;/SendEmailToUserAlias&gt;
                      &lt;DefaultHostName&gt;&lt;/DefaultHostName&gt;
                      &lt;PermittedHosts&gt;&lt;/PermittedHosts&gt;
                  &lt;/RSEmailDPConfiguration&gt;
              &lt;/Configuration&gt;
          &lt;/Extension&gt;
  </code></pre>
  
  <p>And In the <strong>SQL Server Reporting Services (MSSQLSERVER)</strong> Log On As</p>
  
  <p>Option <strong>This Account</strong> : <strong>Network Service</strong>
  and Password blank</p>