Postfix is a Mail Transport Agent (MTA) responsible for the transfer of e-mails between mail servers using the SMTP protocol. Postfix is now the default MTA on CentOS 7. Here, as with most other critical network services, its default configuration allows outgoing but does not accept incoming network connections from any host other than the local one. This makes sense if all you need is a local Linux user mailing system and for sending out mails to other external mail servers from localhost too. But if you want to run your own centralized mail server for your own private network and domain, this is quite restrictive. So the purpose of this recipe is to set up Postfix as a domain-wide mail service to allow e-mails sent from any host in your network and if the recipient is a valid e-mail address within your local domain, deliver them to the correct mailbox on the mail server.
CentOS 7 Linux Server Cookbook - Second Edition
By :
CentOS 7 Linux Server Cookbook - Second Edition
By:
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
Free Chapter
Installing CentOS
Configuring the System
Managing the System
Managing Packages with YUM
Administering the Filesystem
Providing Security
Building a Network
Working with FTP
Working with Domains
Working with Databases
Providing Mail Services
Providing Web Services
Operating System-Level Virtualization
Working with SELinux
Monitoring IT Infrastructure
Index
Customer Reviews