I will try to explain the subject
We use Qmail, VpopMail and Spamdyke
We have multiple servers with jails with multiple domains, we have smtp
servers configured in all the jails, in all the servers
Every jail has an smtp server running with auth over spamdyke, and today
(after a lot of years) we find that everyone can send mail using the rights
credential to any of our servers
I know, they are using valid credentials, but if a password is hacked, the
spamers can login in every server to send mail using this credential
So, the questions is: How can I force the users to use ONLY his smtp to send
mails ?

I think that " reject-sender =  not-local " will work, but, no, only work if
the user don't authenticate

May be is a filter order ?
I asked something similar to this and the solution was that I have to
manually change the order in the source code

Is there other way ?
May be, if the filter order can be altered without changing the source code

It´s a challenge ? :D

Pablo Murillo

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