Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By : Jonathan Hobson
Book Image

CentOS 7 Linux Server Cookbook - Second Edition

By: Jonathan Hobson

Overview of this book

This book will provide you with a comprehensive series of starting points that will give you direct access to the inner workings of the latest CentOS version 7 and help you trim the learning curve to master your server. You will begin with the installation and basic configuration of CentOS 7, followed by learning how to manage your system, services and software packages. You will then gain an understanding of how to administer the file system, secure access to your server and configure various resource sharing services such as file, printer and DHCP servers across your network. Further on, we cover advanced topics such as FTP services, building your own DNS server, running database servers, and providing mail and web services. Finally, you will get a deep understanding of SELinux and you will learn how to work with Docker operating-system virtualization and how to monitor your IT infrastructure with Nagios. By the end of this book, you will have a fair understanding of all the aspects of configuring, implementing and administering CentOS 7 Linux server and how to put it in control.
Table of Contents (22 chapters)
CentOS 7 Linux Server Cookbook Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Index

Delivering the mail with Dovecot


In a previous recipe, you were shown how to configure Postfix as a domain-wide mail transport agent. As we have learned in the first recipe of this chapter, Postfix only understands the SMTP protocol and does a remarkable job to transport messages from another MTA or mail user client to other remote mail servers or storing mails which are destinated to itself into its local mailboxes. After storing or relaying mails, Postfix jobs end. Postfix can only understand and speak the SMTP protocol and is not capable of sending messages to anything other than MTAs. Any possible recipient user for a mail message who wants to read his mails would now need to log in to the server running the Postfix service using ssh and look into his local mailbox directory, or alternatively use mailx locally to view his messages on a regular basis to see if there are any new mails. This is highly inconvenient and nobody would use such a system. Instead, the users choose to access and...