I am self-hosting my domain email on Linux using sendmail. I want my laptop to be able to use this email server as the smtp/pop server, including being able to cc: to other recipients.
I've set up the Outlook outgoing server to require authentication and I've put my Linux ID and password in the "Log on using" section. This permits mail send from my laptop to be delivered to my Linux account, but anyone I cc on some other domain gets reject with "relaying denied".
How do I fix this?