July 2001
Intermediate to advanced
640 pages
18h 9m
English
Content preview from Exim: The Mail Transfer AgentBecome 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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Chapter 9. The Transports
Transports are the modules within Exim that carry out the actual deliveries. Some examples of transports have appeared in earlier chapters; in this chapter, we talk about the options that apply to all of them, and then consider each particular transport in turn. The available transports are as follows:
- appendfile
A transport that writes messages to local files.
- autoreply
A transport that generates automatic replies to messages.
- lmtp
A transport that delivers messages to external processes using the LMTP protocol.
- pipe
A transport that passes messages to external processes via pipes.
- smtp
A transport that writes messages to other hosts over TCP/IP connections, using either SMTP or LMTP.
- autoreply
Really a pseudotransport, because it does not actually deliver the message anywhere; instead it generates a new outgoing message (an automatic reply). It is included among the transports because its method of operation and configuration are the same, and it can include a copy of the original message in the reply.
Options Common to All Transports
There are several generic options that can be set for any transport, though
some of them are used almost exclusively on local transports. The only required
option is driver, which defines which transport is being configured. For the
smtp transport, this is often the only option you need to provide. In
Exim’s default configuration file, it is configured as follows:
remote_smtp: driver = smtp
In this case, the host to which ...
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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.