Set Up ParseDMARC on Ubuntu 20.04 to Analyze DMARC Reports

ParseDMARC is an open-source, self-hosted DMARC report analyzer. For those who don’t know, DMARC is an email security standard that can protect your domain name from email spoofing and also identify incoming spoofed emails to protect end users. In a previous article, we discussed how to create DMARC DNS record for your domain name and…


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Set Up ParseDMARC on Ubuntu 20.04 to Analyze DMARC Reports

Install Akaunting Self-Hosted Accounting Software on Ubuntu 20.04

This tutorial will be showing you how to install Akaunting on Ubuntu 20.04 with Apache or Nginx web server. Akaunting is a free, open-source self-hostable accounting software. You can use it for tracking personal finance or small business accounting. Akaunting Features Completely Free and open source. Easy-to-use web-based Interface. See your financials online anytime, anywhere…


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Install Akaunting Self-Hosted Accounting Software on Ubuntu 20.04

Setting Up Amavis and ClamAV on CentOS 8/RHEL 8 Mail Server

This is part 10 in the CentOS 8/RHEL 8 mail server from scratch tutorial series. In this article, I will show you how to use Amavis and ClamAV to scan viruses in email messages. Amavis (A Mail Virus Scanner) is a high-performance interface between a message transfer agent (MTA) such as Postfix and content filters.…


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Setting Up Amavis and ClamAV on CentOS 8/RHEL 8 Mail Server

Set Up BIND Authoritative DNS Server on CentOS 8/RHEL 8

This tutorial will be showing you how to set up and run your own authoritative name server on CentOS 8/RHEL 8 with the widely-used BIND 9 software. What’s An Authoritative DNS Server? If you own a domain name and want your own DNS server to handle name resolution for your domain name instead of using…


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Set Up BIND Authoritative DNS Server on CentOS 8/RHEL 8

Set Up SMTP Relay Between 2 Postfix SMTP Servers on CentOS/RHEL

Previously we discussed setting up Postfix SMTP relay with mailjet, which is useful when you have to use a commercial SMTP relay service. This tutorial will be showing you how to set up SMTP relay between 2 Postfix SMTP servers on CentOS/RHEL. Use Case Let’s say there are two servers: server A and server B.…


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Set Up SMTP Relay Between 2 Postfix SMTP Servers on CentOS/RHEL

How to Configure User Quota in Dovecot & PostfixAdmin

This tutorial is going to show you how to configure user quota in Dovecot and PostfixAdmin. Prerequisites To follow this tutorial, it’s assumed that Postfix SMTP server and Dovecot IMAP server have been installed on your mail server. If not, please use the following tutorials. Ubuntu Setting up a basic Postfix SMTP server on Ubuntu…


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How to Configure User Quota in Dovecot & PostfixAdmin

Run Your Own DNS over HTTPS (DoH) Resolver on Ubuntu with DNSdist

This tutorial will be showing you how to set up your own DNS over HTTPS (DoH) resolver on Ubuntu with DNSdist, so your DNS queries can be encrypted and protected from prying eyes. What is DNS over HTTPS and Why It’s Important DNS (Domain Name System) is responsible for translating domain names to IP addresses.…


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Run Your Own DNS over HTTPS (DoH) Resolver on Ubuntu with DNSdist