Date: Thu, 6 Sep 2001 06:32:43 +0300 From: Giorgos Keramidas <charon@labs.gr> To: Igor Podlesny <poige@morning.ru> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: auto relaying for subdomains -- why? Message-ID: <20010906063243.A4803@hades.hell.gr> In-Reply-To: <8264494448.20010906104039@morning.ru>; from poige@morning.ru on Thu, Sep 06, 2001 at 10:40:39AM %2B0800 References: <16615694707.20010905210719@morning.ru> <15254.22980.843972.348805@horsey.gshapiro.net> <8264494448.20010906104039@morning.ru>
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[ Removed -hackers from the Cc list. Do we really need to crosspost? ]
On Thu, Sep 06, 2001 at 10:40:39AM +0800, Igor Podlesny wrote:
>
> > +----------+
> > | FEATURES |
> > +----------+
> > ....
> > Available features are:
> > ....
> > relay_hosts_only
> > By default, names that are listed as RELAY in the access
> > db and class {R} are domain names, not host names.
> > For example, if you specify ``foo.com'', then mail to or
> > from foo.com, abc.foo.com, or a.very.deep.domain.foo.com
> > will all be accepted for relaying. This feature changes
> > the behaviour to lookup individual host names only.
>
> Yes, I saw this info here:
> http://www.sendmail.org/m4/features.html#relay_mail_from but most
> valuable part of my question was about the purpose or the idea
> behind this, cause it's not too clear to me why allowing relaying
> for domain FOO.BAR should allow relaying for SUB.FOO.BAR? I
> mentioned RFCs because I had a hope to find out the answer from it
> but still haven't yet...
Because it's nice to be able to relay the entire domain.com by adding
a single line, instead of having to maintain a huge list of
pc1.domain.com, pc2.domain.com, pc3.domain.com ... pcX.domain.com
hostnames.
Having a configurable option to switch between domain-relaying and
host-relaying is also very thoughtful of the Sendmail developers.
Isn't Unix just lovely when such wealth of options is given? :-)
-giorgos
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