Is it possible to add additional smtp aliases to an Office 365 group? I am finding conflicting information but it appears it is possible via Powershell by using
Set-UnifiedGroup -Identity "Office 365 Group Name" -EmailAddresses @{Add="smtp:emailaddress"}
When I did this I was able to use the new alias in addition to the primary for the Office 365 group internally but from external I get the following message despite having "-RequireSenderAuthenticationEnabled $false".
Here is what I get when trying to send to the new additional smtp alias from gmail
Message not delivered
Your message couldn't be delivered to emailaddress because the remote server is misconfigured. See technical details below for more information.
The response from the remote server was:
550 5.4.1 [emailaddress]: Recipient address rejected: Access denied [BY2NAM03FT058.eop-NAM03.prod.] |
Final-Recipient: rfc822; emailaddress
Action: failed
Status: 5.4.1
Remote-MTA: dns; *.mail.. (
the server for the domain domain.)
Diagnostic-Code: smtp; 550 5.4.1 [emailaddress]: Recipient address rejected: Access denied [BY2NAM03FT058.eop-NAM03.prod.]
Last-Attempt-Date: Tue, 03 Oct 2017 14:48:36 -0700 (PDT)
Anyone have an idea why this would be or suggestions on what to try?