[Techtalk] Any postfix experts out there?

Maria McKinley maria at shadlen.org
Fri Feb 16 22:00:59 UTC 2007

Having sent this, I am now not so sure my setup isn't working. All 
incoming mail seems to be spam-checked, and all outgoing mail from us is 
not (checked by us), so I think there must be something else going on 
with the alleged missing mail. One thing that has been strange is that 
this user seems to be somehow using different spam settings than the 
rest of us, but doesn't have a user pref for spam. For example, I have 
an override for how much SPF_FAIL is scored, but his incoming mail has 
SPF_FAIL scores that are the default. I don't understand how this can 
be, but I think I need to check his sieve settings.


Maria McKinley wrote:
> Hi there,
> I am having a hard time wrapping my head around postfix. I have set up a 
> second ip on my mail server. The idea is to use one ip smtp for local 
> use, so it doesn't get checked by the spam filter, and one ip smtp for 
> use by the rest of the world. I can't seem to get the master.cf and 
> main.cf files set up correctly, however. I don't know if it is a 
> confounding factor that I am using NAT.
> So, what I want mail.shadlen.org to receive mail from the world, and 
> smtp.shadlen.org to be what users send mail from.
> What I have currently, seems to be working, but I have a user 
> complaining that some emails to him are not showing up, and looking at 
> the config files, I don't think postfix should be working the way I want 
> it to.
> So, I was under the impression from this how-to
> http://www.seaglass.com/postfix/turning_off_body_checks.html
> That I should add this line to the main.cf file
> inet_interfaces = mail.shadlen.org
> and I think this should be for master.cf:
> mail.shadlen.org:smtp   inet    n       -       n       -       - smtpd
>   -o content_filter=sfilter:
> mail.shadlen.org:587    inet    n       -       n       -       - smtpd
> smtp      inet  n       -       n       -       -       smtpd
> smtp.shadlen.org:587       inet  n       -       n       -       -  smtpd
>   -o receive_override_options=no_header_body_checks
> (A related question is whether I need to add the -o option for both port 
> 25 and port 587. This wasn't done in the original config, which I did 
> not set up, but I'm not sure why.)
> But, when I try to implement this, I get:
>  fatal: bind port 25: Address already in use
> I should add that, everything use to come to smtp.shadlen.org 
> (, and that the new address is 
> mail.shadlen.org( I have tried the main.cf file with both 
> the hostname as mail.shadlen.org and smtp.shadlen.org, and neither works 
> with the other changes. I have both ip addresses listed under 
> proxy_interfaces.
> What am I not understanding?
> thanks,
> maria
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