Jeff Weinberger wrote:

> I noticed that on several occasions,  and in the default master.cf:
>
> -o milter_macro_daemon_name=ORIGINATING
>
> is suggested for the submission service. I'm not familiar with Milters  
> and can't find information on what this is or what this does (at least  
> in my search of the docs). Can you offer any pointers to where I can  
> learn more specifics about milter macro daemons and this specific one?

This parameter is clearly defined in the documentation:
http://www.postfix.org/postconf.5.html#milter_macro_daemon_name
http://www.postfix.org/MILTER_README.html

> Also you noted:
>
>>> In the final step of my scenario, that's the behavior I want to  
>>> achieve.
>>> Will that simple step work?
>>
>> Yes. You can completely disable submission on port 25 and prevent
>> relaying to destinations you don't accept by hosts outside of  
>> mynetworks.
>
> Does smtpd_sasl_auth_enable = no completely disable submission and  
> prevent relaying for hosts I don't accept? or is there more I have to  
> make sure I do?

This disables submission via SASL authenticated clients on port 25.

-- 
Sahil Tandon <sa...@tandon.net>

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