In this guide, we will show you how to set up a Postfix server on CentOS 7 so that we can send mail using the Postfix server. Postfix is a free, open-source mail transfer agent that routes and delivers electronic mail. It is the default MTA for many Linux distributions. This guide will cover the basics of setting up a Postfix server on a CentOS 7 server. We will also cover configuring Postfix to relay mail through an external SMTP server.
What is Postfix?
Postfix is a free, open-source mail transfer agent that routes and delivers electronic mail. It is the default Mail Transfer Agent (MTA) for Ubuntu.
Postfix is installed by default on Ubuntu. The main configuration file is /etc/postfix/main.cf. Postfix also uses several other files for configuring different aspects of its operation, which are all located in the /etc/postfix directory.
How to install and configure Postfix?
Assuming you have a working Postfix server, installation is pretty straightforward. First, you’ll need to grab the latest version from the site and unpack it. Then, follow the instructions in the INSTALL file.
Configuration is a bit more involved, but not too bad. The main configuration file is /etc/postfix/main.cf. A lot of the options should be pretty self-explanatory. If you need help with what something does, consult the documentation. It’s extensive.
Once you have everything configured the way you want, start Postfix (usually with “/etc/init.d/postfix start”). After that, it should all Just Work(TM).
Sending the first mail
You can start sending mail when you’ve set up your Postfix server. You’ll need to use a mail client like Thunderbird or Outlook to do this.
In your mail client, create a new account and enter the following settings:
In the “Server Settings” section, enter the IP address or hostname of your Postfix server for both the “Incoming” and “Outgoing” fields. The default ports are 110 (POP3) and 25 (SMTP).
If you’re using SSL/TLS, you’ll need to select the appropriate options in your mail client. For POP3, this is usually port 995 with SSL enabled. For SMTP, it’s port 465 with SSL enabled.
Enter your username and password in the appropriate fields. This is the same username and password that you set up when configuring Postfix.
Once you’ve entered all the required information, you should be able to connect to your Postfix server and start sending and receiving mail.
Conclusion
Postfix is a powerful mail server that can send and receive mail. It is open-source software and is very easy to set up and configure. In this article, we have shown you how to install Postfix on your server and how to use it to send mail. We hope that this has been helpful for you and that you can now use Postfix to send mail from your own server.
Also Read: How to Setup Your Simple SMTP Server
Anthony Goldstein is an American author from California. He is best known for his work in the tech industry, where he has written extensively on topics such as artificial intelligence and the future of technology.