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List:       postfix-users
Subject:    Re: mynetworks and parent_domain_matches_subdomains
From:       Victor Duchovni <Victor.Duchovni () MorganStanley ! com>
Date:       2005-01-31 16:46:31
Message-ID: 20050131164631.GW9559 () piias899 ! ms ! com
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On Mon, Jan 31, 2005 at 05:39:21PM +0100, Ralf Hildebrandt wrote:

> * TOMITA Masahiro <tommy@tmtm.org>:
> 
> > Really?  If it is so, why is 'mynetworks' included in parent_domain_matches_subdomains?
> 
> Dunno. Wrong docs?
> 

Actually mynetworks does implement domain name lookup, but this features
is deliberately undocumented, and is unsupported. One clear problem with
using domain names in mynetworks, is that temporary DNS lookup errors
are not handled correctly unless one uses:

	smtpd_recipient_restrictions =
		    # It is unsupported and unwise to use domain names
		    # in mynetworks...
		permit_mynetworks,
		    # Tempfail unresolved clients to avoid false 5XX
		    # when DNS fails for whitelisted (by name) clients!
		reject_unknown_client,
		reject_unauth_destination

-- 
	Viktor.

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