Forum Discussion
Internal emails being treated as external emails
We have Exchange Online only - We have an application that sends out emails to users within the company however we have found an issue where all our distribution group recipients aren't getting the ...
I assume you're using Option 3 from the below:
https://learn.microsoft.com/en-gb/Exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365?redirectSourcePath=%252farticle%252fHow-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4
https://learn.microsoft.com/en-gb/Exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365?redirectSourcePath=%252farticle%252fHow-to-set-up-a-multifunction-device-or-application-to-send-email-using-Office-365-69f58e99-c550-4274-ad18-c805d654b4c4
Similar scenario for us. We have an internal server set up as a relay. If we were using Option 2, would it be treated as internal or external emails?
As long as the connector is set up correctly as a "your org to office 365" connector it should be OK.
There isn't much to the config, I'm not sure how I could have this messed up. We do receive emails, but only if the distribution list is set to receive emails externally.
I identify via IP address. I also have the box checked to "retain internal Exchange email headers".