Solved

Why can't external people email a distribution group email address on Windows SBS 2008 server

Posted on 2010-09-08
2
1,228 Views
Last Modified: 2012-05-10
I have a windows 2008 SBS server and I can email various email addresses/mailboxes within the exchange server. I setup a distribution group info@mydomain.com using the wizard withing the Exchange Managment Console. I can email info@mydomain.com from within the organisation (i.e. mailboxes on the exchange server) however I cannot email from outside the exchange server. I get a returned message as follows ...

Your message did not reach some or all of the intended recipients.

      Subject:      Test 03
      Sent:      08/09/2010 15:06

The following recipient(s) cannot be reached:

      info@yourdomain.com on 08/09/2010 15:06
            The e-mail system was unable to deliver the message, but did not report a specific reason.  Check the address and try again.  If it still fails, contact your system administrator.
            < smtp.server.com #5.0.0 X-Postfix; host x.x.x.x[x.x.x.x] said: 550 5.1.1    User unknown (in reply to RCPT TO command)>

x.x.x.x is the IP address of my firewall who has a NAT and firewall rule to allow mail through to the exchange server. This is working as I do recieve emails for the other mailboxes.

Any ideas on where the restriction is? I thought it might be that the distribution group is set to only work internally but I cannot find the setting to change it.
0
Comment
Question by:btec_bob
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 15

Accepted Solution

by:
Dave_AND earned 500 total points
ID: 33627614
On the distribution group, you will need to enable the people to email to it from the outside world.

Open the Group in question, mail flow settings, message delivery restriction, and untick the "requires that all senders are authenticated"
0
 

Author Closing Comment

by:btec_bob
ID: 33627839
Perfect
0

Featured Post

Office 365 Training for Admins - 7 Day Trial

Learn how to provision tenants, synchronize on-premise Active Directory, implement Single Sign-On, customize Office deployment, and protect your organization with eDiscovery and DLP policies.  Only from Platform Scholar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In-place Upgrading Dirsync to Azure AD Connect
Check out this step-by-step guide for using the newly updated Experts Exchange mobile app—released on May 30.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question