December 2003
Beginner
278 pages
10h 47m
English
Content preview from Postfix: The Definitive GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Local Delivery
All destination domains that should be handled by the
local transport should be listed in the mydestination parameter. You can list as many domains as you like, but
individual local users receive mail at all of the domains listed. For
example, if both ora.com and
oreilly.com are listed in mydestination, then messages to either
kdent@ora.com or
kdent@oreilly.com go to the same local
mailbox.
All local recipients should be listed in tables configured in
the local_recipient_maps parameter to avoid accepting messages for unknown users.
By default, local_recipient_maps is
set to the system password file and alias maps, so you normally don’t
have to make any changes. Once Postfix has determined that it is the
final destination for a message, and that the message should be
delivered locally, it has to decide what to do with the message.
Before looking for a user account that matches the local part of the email address, Postfix consults its alias maps (see Chapter 4). If there is a forwarding alias that matches the recipient address, Postfix resubmits the message as a new delivery, based on the forwarding information from the alias lookup. Otherwise, it tries to deliver the message to a user on the system. Postfix first checks for the existence of a .forward file for the local user, and may resubmit the message based on information there. If no .forward exists for the user, Postfix delivers the message to the user’s mailbox.
.forward Files
.forward files allow local users ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.