Date: Thu, 6 Sep 2001 10:40:39 +0800 From: Igor Podlesny <poige@morning.ru> To: Gregory Neil Shapiro <gshapiro@FreeBSD.ORG> Cc: freebsd-isp@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re[2]: auto relaying for subdomains -- why? Message-ID: <8264494448.20010906104039@morning.ru> In-Reply-To: <15254.22980.843972.348805@horsey.gshapiro.net> References: <16615694707.20010905210719@morning.ru> <15254.22980.843972.348805@horsey.gshapiro.net>
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poige>> I noticed that some mailers (sendmail, postfix) in case they allow
poige>> relaying for somedomain.zone also allow relaying for
poige>> subdomain-of.somedomain.zone.
poige>> I can accept this as reasonable behavior but would like to know how to
poige>> deny it! :) Also I wish to know what was the actual idea behind this?
>>From /usr/share/sendmail/cf/README:
> +----------+
> | 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...
--
Igor mailto:poige@morning.ru
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