Postfix s configuration file is located in etc postfix main cf.
Postfix mail server configuration in linux step by step in centos.
Systemctl restart postfix if postfix does not start correctly you can use following commands to troubleshoot.
Edit the main cf file.
Edit the master cf file.
However if you want send receive mails to outside you should configure the mail server with a public ip and request your isp to configure the mx record of your mail server in their dns server.
Configure forward zone file and reverse zone file using named chroot using centos or rhel 7.
How to configure dns server in rhel 7 step by step.
Create an aliases table.
Let s start postfix configuration.
Set postfix selinux permission.
Step 4 follow the below steps one by one for creation.
The above selinux boolean will allow postfix to write to the mail spool in the central server.
Dns server configuration in linux step by step centos.
Although the same steps should work on rhel and scientific linux 7 distributions.
Make postfix as default mta for your system using the following command.
After package installation continue with postfix configuration.
If postfix is already running on your server then skip installing postfix.
We need to make a few changes in the configuration file so open it using your favorite text editor.
Setting up postfix smtp relay on centos rhel first let s install postfix smtp server on centos rhel with the following command.
First create ssl certificate for encryption.
Make changes to the following lines.
Systemctl l status postfix journalctl xn postconf n.
Postfix is a common mail server many large distributions are shipped with postfix installed by default.
The default configuration allows local mailing only but that in itself is very useful on a machine used by many users and even if there is no such traffic many services dump their reports and messages into e mails which is delivered to the root user locally so the sysadmin will be.
Alternatives set mta usr sbin postfix if above command not work and you get the output as usr sbin postfix has not been configured as an alternative for mta.
Install bind centos 7 or centos 8.
Use below command to do the same else skip it.
Alternatives set mta usr sbin sendmail postfix step 2 configure postfix.
I tested this setup on centos 64 bit server.
The mail server should contain a valid mx record in the dns server.
Email protected service iptables stop email protected service ip6tables stop email protected chkconfig iptables off email protected chkconfig ip6tables off.
Firewall and selinux should be disabled.
Restart the service on both servers for the changes to take effect.
How to configure dns server in rhel 7 or rhel 8 step by step.
Determine local mail delivery method.
It is time we configure postfix mail server.
Sudo dnf install postfix.
Configure postfix mail server centos rhel 7 8 now we are done with all the pre requisites.
Several steps are necessary to configure the postfix server the basic steps involved in this process are.
Root mail mkdir etc postfix ssl root mail cd etc postfix ssl root krizna ssl openssl genrsa des3 out server key 2048.
