CaptainGiblets
asked on
Cant send external email to exchange contact
I am creating a mail enabled list in sharepoint which creates a contact in exchange. I have done this for several lists without issue.
Today I have created a new contact via sharepoint and when I trying to send an email from external to the list my emails are failing on routing with the error message
"Fail"
LED=550 5.7.136 RESOLVER.RST.SenderNotAuth enticatedF orRecipien t; authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this recipient
Now I know I need to set permissions for distribution groups but there is no such option for contacts that I can see.
Internal users can send emails without issue.
I have tried looking through a working contact and this one but I cant see anything. Hopefully its something with me being stupid and missing something obvious. Does anyone have any ideas what could cause this?
Today I have created a new contact via sharepoint and when I trying to send an email from external to the list my emails are failing on routing with the error message
"Fail"
LED=550 5.7.136 RESOLVER.RST.SenderNotAuth
Now I know I need to set permissions for distribution groups but there is no such option for contacts that I can see.
Internal users can send emails without issue.
I have tried looking through a working contact and this one but I cant see anything. Hopefully its something with me being stupid and missing something obvious. Does anyone have any ideas what could cause this?
which version of exchange are you using , below screens shot if for Exchange 2013 and remove the option Require that all senders be authenticated and your issue will be resolved.
ASKER
We are using Exchange 2016. There is no option for users to be Authenticated under contact, there is for distribution groups but not for contacts.
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