I recently added a new domain to my OS 10.5 Leopard Server machine and I can only send from my own domain, meaning I can only send emails if my users are the ones sending the emails, If I send an email from a hotmail account or Gmail or any other domain, they never arrive.
I can only send emails if the users are in the same domain for example:
My domain is www.mydomain.com, wich has users in the Open Directory as user1, user2.
When I create an email account for user1, user1 can send and receive emails as long as user1 is the sender. If user2 is the sender and sends to user1 user1 will receive it without problems.
If email@example.com sends user1 or user2 an email they will not arrive at their destinations. If user1 or user2 send an email to firstname.lastname@example.org, email@example.com receives it.
Any ideas why this is happening? I already have under Server Admin, Mail service, Advanced, Hosting, the name of my domain.