Using Postfix and Dovecot mail service program to configure the system services on Linux systems. E-mail system based on e-mail protocol to complete the transmission of e-mail, common mail protocol is
25 / TCP port used to send e-mail and transit issued by the occupation of the server: Simple Mail Transfer Protocol (Simple Mail Transfer Protocol, SMTP).
Post Office Protocol version 3 (Post Office Protocol 3, POP3): used to store e-mail to the local host, occupying server 110 / TCP port.
Internet Message Access Protocol version 4 (Internet Message Access Protocol 4, IMAP): for 143 / TCP port on the local host access e-mail, take the server.
Configuring e-mail system services steps:
1, configure the server host name, host name of the server needs to ensure consistency with the transmission domain name;
2, clear the iptables firewall default policy, strategy and save the state, to avoid default firewall policy exists to prevent a customer end of domain names and DNS resolution mail;
3, e-mail provides domain name resolution system. Since Chapter 13 explains how to configure the bind-chroot service program, so here only the main configuration file, configuration files and configuration content area domain data files, and the remaining configuration steps please complete on their own;
Note: Restart bind service program
Configuring Postfix service program
Postfix service program's main configuration file: / etc / postfix / main.cf
Configuring Dovecot service program
Dovecot is able to provide a system for the Linux open source IMAP and POP3 e-mail service program services, high security, simple configuration, fast implementation, but also take up less server hardware resources, and therefore is a recommended pickup service program.
Dovecot service program's main configuration file: /etc/dovecot/dovecot.conf
Customers to use e-mail system
using Outlook Windows system as a client, configure mail through mail server configuration Linux systems.
Reproduced in: https: //blog.51cto.com/948891/2406698