Hi,To allow an my external server to send out email, I have created an email relay setup using mail flow>connectors in EAC.
I have also added the server IP address to identify it as belonging to my organization.
However when the email was send out by this external server, the email was rejected by Distribution List with the reason "doesn't allow messages from external senders".How do I recognize this IP address as my organization IP, as I do not want to allow the option of allowing external senders for my Distribution List.Thanks.
Did you configure the "externally secured" option? Either that, or toggle the DG settings.