Postfix/Network config out of the box - was: Re: Please participate in the Ubuntu Popularity Contest !

[Scott Kitterman]

On Sun, 16 Jul 2006 23:12:35 +0200 albi <albi at scii.nl> wrote:
>On Sun, 16 Jul 2006 14:01 -0700
>Scott Kitterman <ubuntu at kitterman.com> wrote:
>
>> >The danger in the Ubuntu setup is that it can (and will) land your
>> >machine in the CBL blacklist for having a non-RFC compliant mail
>> >system.  The non-compliance is that your machine responds with either
>> >localhost, localhost.localdomain, or 127.0.0.1 to a HELO command.
>> >
>> >Note that if you configure your Ubuntu system correctly prior to
>> >installing postfix, then postfix will install properly configured out
>> >of the box (with a correct 'myname' entry).
>> >
>> I'm not sure which Ubuntu version you are using, but I've built two
>> Postfix servers recently using the Ubuntu Dapper server install and I
>> don't recall having to edit those files.  I don't have access to SSH
>> where I am now, but I'll look at those files tomorrow when I do.
>> 
>> I did mess this up once and get myself on CBL, but that was with SUSE.
>> 
>> While I don't agree that the default config is broken as you say,
>> your suggestions for testing look good.
>
>i can confirm that this really is a problem with CBL, if you don't use a
>FQDN in your postfix-config OR a relay-host you will (sooner or later)
>have a problem with CBL
>
Oh I definitely agree FQDN for EHLO is important (and an RFC requirement), 
I just don't recall having to go through all those gyrations to get a FQDN. 
 I don't think that the Ubuntu setup is broken out of the box.

Of almost the same importance is getting correct PTR records set for 
reverse DNS.

Scott K