Hi, I have created several emails linked to distribution groups in Exchange 2007. When i email to these groups from an email hosted on the server the email goes through just fine. When I try to send to these emails from an external email address (one from hotmail or yahoo) the email is never received and I never get a message back saying anything went wrong. I am able to receive email to all normal user accounts. I know it was possible in Exchange 2003 to have group emails receive email from outside sources, as I used several group emails as logins at various forums, and received updates from them. Am I missing some point of the setup? I have all domains open to be received from, hence why I can receive to my normal user email address. Any help would be apprecaited. Thanks

Hello Scotty, When you create any distribution list with Exchange Management Console - EMC or Exchange management Shell - EMS in 2007 by default Sender Authentication is Enabled to prevent unwanted messages from spam and from outside domain, this is by default in design... You need to disable it to get email from outside. From EMC: Recipient Configuration -> Distribution Groups -> Select a group -> Properties -> Mail Flow Settings -> Message Delivery Restrictions -> Properties -> Untick Require that all senders are authenticated From EMS: Distribution List not getting mails from outside - NDR 5.1.1

I've been having the same propblem, but in Exchange2003. I've created universal distribution groups and although I can send as them, i cannot send TO them from a hotmail account for instance. Any clues?ThanksLyko.

What kind of error are you having? I set groups to universal and it works fine....

Hi, I have experience this also in exchange server 2003 after i have installed Windows Server 2003 SP1. This is the error i got. Remote host said: 550 Rule imposed mailbox access for xxx@123.com refused: user invalid [RCPT_TO] where xxx@123.com is the distribution group email Cheers Andy

This Solution worked for me.Thank You.

Is there a way in excahnge 2007 to have this setting disabled by default... Its really annoying to have it enabled by default.

You could use PowerShell to create all your distribution groups with this set the way you want.-- Ed Crowley MVP"There are seldom good technological solutions to behavioral problems.". "sdooms" wrote in message news:c7b37e44-7c7f-42ad-8f7c-b2b9d52d03c9... Is there a way in excahnge 2007 to have this setting disabled by default... Its really annoying to have it enabled by default. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Is there a way in excahnge 2007 to have this setting disabled by default... Its really annoying to have it enabled by default. Hi, Yes there is a way using Templates. Using templates u can create new DLs based on the settings of existing DLs. For this you can set your desired properties on a DL, and then can use that DL as a template for new DLs like $Template = Get-DistributionGroup "DGTemplate" New-DistributionGroup -Type Distribution -SamAccountName DG1 -Name DG1 -OrganizationalUnit "contoso.com/Users" -TemplateInstance $Template Plz have a look into this for detail: http://technet.microsoft.com/en-us/library/bb125152(EXCHG.80).aspx Regards, Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

Amit, Thanks for a good post. I have one question about it. I just disable Authentication on my 2007 Distribution Group but emails are still coming back with 5.1.1. It is a less than 100 users environment with just one server, is it a AD synchronization latency issue? Thanks in advance!

I was synchronization! After an hour or so, everything worked! Thanks, Amit!

Writeup in FAQ: http://exchange-faq.com/2010/why-doesnt-my-new-distribution-group-does-not-accept-emails-from-outside/

To display the value whether it is TRUE or FALSE Get-DistributionGroup “Group 11″ | Select-Object Name, RequireSenderAuthenticationEnabled To set the value to FALSE Set-DistributionGroup “Group 11″ -RequireSenderAuthenticationEnabled $False I have taken this from the following link AS IS http://exchangeshare.wordpress.com/2008/05/18/distribution-list-not-getting-mails-from-outside-ndr-511/

Thanks