Am 13.04.2013 21:42, schrieb b...@bitrate.net:
> 
> On Apr 13, 2013, at 15.33, Russell Jones <russ...@jonesmail.me> wrote:
> 
>> Hi all,
>>
>> Upgrading mail server from Postfix 2.9 to 2.10. Could I get a quick sanity 
>> check to ensure my (fairly simple) setup is sane with the new 
>> smtpd_relay_restrictions?     Thanks :-)
>>
>> smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated 
>> reject_unauth_destination
>> smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated 
>> check_client_access hash:/etc/postfix/rbl_override reject_rbl_client 
>> zen.spamhaus.org
> 
> really, neither of permit_mynetworks nor permit_sasl_authenticated belong in 
> any global restrictions.  
> smtp auth [e.g sasl] is for submission clients, which should be using 
> submission/587, and these days, 

fine - in the real life you start not from scratch

have fun calling hundrets and thousands of users especially with broken
clients like a iPhone and explain them what to do to change the port

in a perfect world i would even close port 25 from the WAN because
the MX is a dedicated spam-firewall, but as said above this world
exists mostly only if you are a startup with no existing customers

> i really just discourage use of permit_mynetworks altogether

if you are not stupid enough to add a /24 network there it is pretty fine
you do not want to pass every internal server sending a system-message to
check_recipient_access which may be a spam-filter





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