Knowledgebase
Functional account not receiving Emails

Issue : Emails sent inbound to a distribution list are showing delivered within Proofpoint Essentials but not reaching the distribution list.

Resolution : Within exchange under the Distribution list properties there is a parameter that needs to be modified so that external Emails can be received.

Follow these steps :

                              1. Go to the distribution list's Properties.

                              2. Click on the Mail Flow Settings tab.

                             3. Double-click Message Delivery Restrictions.

                              4. Uncheck the box "Require that all senders are authenticated."

https://technet.microsoft.com/en-us/library/bb124405(v=exchg.141).aspx#MDRestrictions

Please contact Microsoft for any further information.

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