Sysadmin

SMTP port 25 is often blocked by ISPs, preventing the use of a locally hosted email server. Here are a few ways to get around this.

Forwarding the correct ports is a requirement to hosting a web server. This article explains which ports to forward, and how to test them.

DNS records route traffic to your web server. They’re a vital part of your mail server setup. This guide will explain how to set them up.

DMARC is another feature that helps to protect your mail server. Here’s how you can set it up.

Matching your sending domain with your rDNS is important to ensure your messages are accepted by the receiving mail server. It’s often overlooked, but this guide shows you how it’s done.

Testing your email server is vital if you want to avoid blacklists, and ensure your emails reach an inbox. Here’s how to do it.

Setting up an email server can be a complicated, but rewarding task. Here’s why you should give it a go.

Postfix is a mail transfer agent, used to both send and receive emails on your server. This guide will go through a basic Postfix setup.

Once you have OpenDKIM set up, you’ll want to connect it to your MTA to sign outgoing emails. Here’s how you can use it with Postfix.

DKIM is a useful feature designed to prevent email spoofing, protecting your email domain. Here’s how you can set it up on your email server.