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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Separate Message Store
The last configuration we’ll consider is hosting virtual domains with a system using a proprietary message store. To work with these systems, Postfix hands off messages using a protocol like LMTP, letting the proprietary system handle delivery to the correct mail box.
Since Postfix must receive messages before handing them off to the
LMTP server, it has to know that it should accept mail for each of the
virtual domains. List them in virtual_mailbox_domains :
virtual_mailbox_domains = ora.com, oreilly.com
You also have to list each email address, so Postfix can accept
messages for valid addresses and reject unknown users. Use the virtual_mailbox_maps parameter to point to a lookup file with valid
addresses:
virtual_mailbox_maps = hash:/etc/postfix/virtual
In the /etc/postfix/virtual file, the righthand value isn’t used because all messages are passed along to the POP/IMAP server. You must still include a righthand value because lookup tables must have a key and a value, but the value you use doesn’t matter:
info@ora.com General Information Address info@oreilly.com General Information Address
In order to have Postfix pass mail for virtual domains through to
your POP/IMAP server, specify the correct transport in the virtual_transport parameter in main.cf. You have to know how your LMTP
server socket is set up. Assuming it’s on the same host as
Postfix and uses a socket file located at /var/imap/socket/lmtp, the transport lookup table for the example domains looks ...
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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.
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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.