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Question How to prevent logged users from sending email from a different account in the server

Hi

I see in Postfix a logged in postfix user is able to send email with any From: address they want, they could even send from another domain on the same server.

Is it possible to prevent this?
Regards
 
There are some tips here regarding that:
 
I see in Postfix a logged in postfix user is able to send email with any From: address they want, they could even send from another domain on the same server.

Is it possible to prevent this?
Not easily.
But a mail that is sent with a From: not matching the authenticated user should have a Sender: line added by postfix.
 
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