Unable to email a Distribution List from an External email address

Howdy,

We have two Distribution Lists that we need tobe able to send to from external email addresses.  I went into the ECP and edited the Delivery Management setting and changed it from Only senders inside my organization to Senders inside and outside of my organization but I still can't send to the DL.

Is there another setting somewhere that might be preventing these emails from coming through?

Thanks!

UPDATE: Just got a rejection bounce with the error below.  It says to change the setting that I already changed so not sure what else to check.

~~~~~~~~~~~~~~~~~~~~~

Delivery has failed to these recipients or groups:

Your message couldn't be delivered because the group you're sending to needs to know who you are before it will accept your message.

To fix this problem, ask the email admin for the group to configure the group to accept messages from you.

For Email Administrators
This error occurs when the group is configured to reject email from senders outside of the group's organization. To fix the issue, the recipient's email admin must either add the sender's address to the group's list of allowed senders or they must select the group's delivery management option that allows senders both inside and outside of their organization to send email to it.

September 1st, 2015 9:33am

Hi ,

Have you received any NDR messages to the mailbox from where you are trying to send an email .If so please share us the NDR message to us .Based on that we can start troubleshooting .

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September 1st, 2015 9:37am

Hi ,

Have you received any NDR messages to the mailbox from where you are trying to send an email .If so please share us the NDR message to us .Based on that we can start troubleshoo

September 1st, 2015 9:47am

Hi,

Try disable the tick box on the group that requires that all senders are authenticated. It may also be that the you've changed setting takes time to take effect.

Thanks.

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September 1st, 2015 1:10pm

Hi,

Please uncheck the below highlighted option to test.

Then restart the exchange transport service .

Regards

David

September 1st, 2015 10:05pm

Hi,

Please uncheck the below highlighted option to test.

Then restart the exchange transport service .

Regards

David


Do I find that on the Exchange server itself or is that in AD?  We do everything via the Web interface for exchange.
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September 1st, 2015 10:36pm

Hi,

Sorry for any conveniences. The above option is located on the exchange 2010 .

What is your detailed exchange environment? Is it office 365?

According the error, I have a similar thread for your reference:

https://community.office365.com/en-us/f/158/t/291202

Regards,

David 

September 2nd, 2015 3:06am

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