How to allow external email to send email to distribution list (NEW EAC)

Question

I am owner of this email group, I login to the EAC and then navigate to groups > groups I own > Edit delivery management. Select Senders inside and outside my organization and click save. Here is the error I see on the interface.

Answer 1

Hi Yu,

You may want to try via Powershell...

Set-DistributionGroup -Identity "your distro name here" -RequireSenderAuthenticationEnabled $False

The RequireSenderAuthenticationEnabled parameter specifies whether to accept messages only from authenticated (internal) senders. Valid values are:

• $true: Messages are accepted only from authenticated (internal) senders. Messages from unauthenticated (external) senders are rejected.
• $false: Messages are accepted from authenticated (internal) and unauthenticated (external) senders.

From https://learn.microsoft.com/en-us/powershell/module/exchange/set-distributiongroup?view=exchange-ps

I hope it helps.