Centos 7 install mail server
Here's a step-by-step guide to installing a mail server on CentOS 7:
Step 1: Install the necessary packages
Open a terminal and run the following command to install the necessary packages:
sudo yum install postfix dovecot mariadb-server
This will install the Postfix mail transfer agent, Dovecot IMAP/POP3 server, and MariaDB database server.
Step 2: Configure Postfix
Edit the Postfix configuration file:
sudo nano /etc/postfix/main.cf
Add the following lines to the end of the file:
mydestination = example.com
myhostname = mail.example.com
myorigin = $myhostname
Replace example.com
with your domain name.
Step 3: Configure Dovecot
Edit the Dovecot configuration file:
sudo nano /etc/dovecot/dovecot.conf
Add the following lines to the end of the file:
mail_location = maildir:~/Maildir
first_valid_uid = 500
first_valid_gid = 500
Step 4: Configure MariaDB
Create a new database and user for the mail server:
sudo mysql -u root -p
Create a new database:
CREATE DATABASE mail;
Create a new user:
CREATE USER 'mailuser'@'localhost' IDENTIFIED BY 'password';
Grant privileges to the user:
GRANT ALL PRIVILEGES ON mail.* TO 'mailuser'@'localhost';
Step 5: Configure Postfix to use MariaDB
Edit the Postfix configuration file:
sudo nano /etc/postfix/mysql.cf
Add the following lines to the end of the file:
hosts = localhost
user = mailuser
password = password
dbname = mail
Step 6: Restart Postfix and Dovecot
Restart the Postfix and Dovecot services:
sudo systemctl restart postfix
sudo systemctl restart dovecot
Step 7: Configure the mail server
Create a new file in the /etc/postfix/
directory:
sudo nano /etc/postfix/virtual
Add the following lines to the end of the file:
@example.com mail.example.com
Replace example.com
with your domain name.
Step 8: Restart Postfix
Restart the Postfix service:
sudo systemctl restart postfix
Step 9: Test the mail server
Use the telnet
command to test the mail server:
telnet mail.example.com 25
Replace mail.example.com
with your mail server's hostname.
You should see a response from the mail server. If you don't see a response, check the Postfix and Dovecot logs for errors.
That's it! You should now have a working mail server on CentOS 7.