[82025] in North American Network Operators' Group
Re: OT? /dev/null 5.1.1 email
daemon@ATHENA.MIT.EDU (Eric A. Hall)
Fri Jul 8 15:34:29 2005
Date: Wed, 06 Jul 2005 02:04:54 -0400
From: "Eric A. Hall" <ehall@ehsco.com>
To: Pekka Savola <pekkas@netcore.fi>
Cc: Adi Linden <adil@adis.on.ca>, Jim Popovitch <jimpop@yahoo.com>,
nanog@nanog.org
In-Reply-To: <Pine.LNX.4.61.0507060831150.17591@netcore.fi>
Errors-To: owner-nanog@merit.edu
On 7/6/2005 1:32 AM, Pekka Savola wrote:
>>Make your secondary mx aware of all the valid recipient addresses.
>
> Are there mechanisms in postfix or sendmail to do this automatically,
> or should this be done out-of-band? I've tried looking for this
> feature, but found nothing; maybe I don't know the right terms to
> search for.
Just about any MTA that is serious enough to be used also supports some
kind of networked database for recipient lookups. With postfix, check the
docs for local_recipient_maps. I don't remember how this is done in
Sendmail, but it's possible there too.
There can be a second step here, of separating the recipient lookups from
the known (local) delivery mailboxes. Getting the lookups and the remote
delivery to work together can be non-obvious and tricky. With postfix,
check http://www.postfix.org/LDAP_README.html for a discussion on using
virtual maps to make this work.
--
Eric A. Hall http://www.ehsco.com/
Internet Core Protocols http://www.oreilly.com/catalog/coreprot/
