Systemctl restart postfix if postfix does not start correctly you can use following commands to troubleshoot.
Postfix mail server configuration in linux step by step in centos.
Configure postfix mail server centos rhel 7 8 now we are done with all the pre requisites.
Step 6 configure postfix mail server.
Configure forward zone file and reverse zone file using named chroot using centos or rhel 7.
Firewall and selinux should be disabled.
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.
Alternatives set mta usr sbin sendmail postfix step 2 configure postfix.
Systemctl l status postfix journalctl xn postconf n.
First create ssl certificate for encryption.
Navigate to this link how to setup dns server.
Install bind centos 7 or centos 8.
The mail server should contain a valid mx record in the dns server.
How to configure dns server in rhel 7 or rhel 8 step by step.
How to configure dns server in rhel 7 step by step.
Use below command to do the same else skip it.
Let s start postfix configuration.
Restart the service on both servers for the changes to take effect.
Dns server configuration in linux step by step centos.
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.
After package installation continue with postfix configuration.
Make changes to the following lines.
Determine local mail delivery method.
We need to make a few changes in the configuration file so open it using your favorite text editor.
Sudo dnf install postfix.
Root mail mkdir etc postfix ssl root mail cd etc postfix ssl root krizna ssl openssl genrsa des3 out server key 2048.
Several steps are necessary to configure the postfix server the basic steps involved in this process are.
Although the same steps should work on rhel and scientific linux 7 distributions.
Dns server configuration in linux step by step centos.
Postfix is a common mail server many large distributions are shipped with postfix installed by default.
Edit the master cf file.
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.
Make postfix as default mta for your system using the following command.
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.
If postfix is already running on your server then skip installing postfix.
Setting up postfix smtp relay on centos rhel first let s install postfix smtp server on centos rhel with the following command.
Postfix s configuration file is located in etc postfix main cf.
I tested this setup on centos 64 bit server.
Edit the main cf file.
It is time we configure postfix mail server.
