Linux Mail Server Setup and Howto Guide

Hi all,

I have been configured smtp with sasl authentication via AD, but this is only restrict the internal users send the email to outside email accounts.

What I want to restrict is regardless sending email inside or outside, the users needs to be authenticated first. Otherwise, user will get relay access deny.

Is there any anyone has make this works yet? Can you share to me?

Thanks,

Toan Nguyen

I see, thanks. In this case, we will have a spam issues of internal. Since if we host our server online, then untrusted clients can send spam to internal domain with anonymous senders.

Do we have any ways to restrict this?

Thanks,

Toan Nguyen