Best Operating Systems for iRedMail

Greater security. More packages. Newer tools. All your open source software, from cloud to edge. Secure your open source apps. For CVE compliance, patch the entire stack, including libraries and applications. Auditors and governments have certified Ubuntu for FedRAMP and FISMA. Rethink the possibilities with Linux and open-source. Canonical is engaged by companies to reduce open-source operating costs. Automate everything: multicloud operations, bare-metal provisioning, edge clusters, and IoT. Ubuntu is the perfect platform for anyone who needs a powerful machine to do their work, including a mobile app developer, engineer manager, music or video editor, or financial analyst with large-scale models. Because of its reliability, versatility, continually updated features, extensive developer libraries, and widespread use, Ubuntu is used by thousands around the globe.

Debian can be downloaded freely via the Internet. This page provides options for installing Debian Stable. Visit our releases page if you are interested in Testing or Unstable. Many vendors sell distributions for less than US$5 plus shipping. Check their website to see if they ship internationally. You can test Debian by booting from a CD, DVD, or USB key. No need to install any files. Once you are done, you can run the included installer. This is the user-friendly Calamares Installer. This method may work for you if the images meet your requirements in terms of size, language and package selection. To help you make a decision, read more about this method.

OpenBSD is entirely developed by volunteers. OpenBSD Foundation contributes to funding the project's development environment, and developer events. OpenBSD will continue to be a free and vibrant operating system thanks to your contributions. OpenBSD has embedded cryptography in many places within the operating system. We demand that cryptographic software used by us be freely available and licensed. We don't use cryptography that is protected by nasty patents. We also require that the software be from countries with export licenses. This is because we don't want to break any country's laws. Keep it as political-free as possible. Solutions should be based on technical merit.

FreeBSD has many advanced networking, security, and compatibility features that are not available in commercial operating systems. FreeBSD is an ideal Internet and Intranet server. It can provide reliable network services even under heavy loads. It also uses memory efficiently to maintain high response times for thousands concurrent user processes. FreeBSD provides advanced network operating system features for embedded platforms and appliances, including Intel-based appliances and ARM, PowerPC and MIPS hardware platforms. Vendors around the globe rely on FreeBSD for their embedded products, which includes mail and web appliances, routers, time servers and wireless access points. They can also decide how many local changes they want back through the Berkeley open-source license.

Open source, community-owned, and governed Linux distribution for enterprise. It is focused on long-term stability and provides a solid production-grade platform. AlmaLinux OS is 1:1 compatible with RHEL®, and pre-Stream CentOS. Our GitHub organization contains source codes and tools used in building AlmaLinux OS. Reddit is a vibrant community that allows you to interact with other AlmaLinux OS users and receive updates. You can also find and offer help. You can have a real-time conversation with other members of the AlmaLinux OS community, the governance team, and AlmaLinux OS OS developers. Ask questions, get answers, and provide community support to other members of the AlmaLinux OS community as well as developers. AlmaLinux OS is a completely free, standalone OS that receives $1M annually in sponsorship from CloudLinux Inc as well as support from other sponsors. The community members manage the ongoing development efforts.

CIQ empowers people to do amazing things by providing innovative and stable software infrastructure solutions for all computing needs. From the base operating system, through containers, orchestration, provisioning, computing, and cloud applications, CIQ works with every part of the technology stack to drive solutions for customers and communities with stable, scalable, secure production environments. CIQ is the founding support and services partner of Rocky Linux, and the creator of the next generation federated computing stack.

CentOS Linux is a community-supported distribution that was derived from freely available sources on Red Hat or CentOS Git for Red Hat Enterprise Linux. CentOS Linux is functionally compatible with RHEL. The CentOS Project changes packages primarily to remove artwork and branding from upstream vendors. CentOS Linux is free and available at no cost. Each CentOS version will be maintained until the RHEL version that is equivalent goes out of support. Once a new RHEL version has been rebuilt, a new CentOS version will be made available. This happens approximately every 6-12months for minor version bumps and several years for major versions. The rebuild can take anywhere from weeks for point releases to several months for major version bumps. This creates a stable, reliable, predictable, reproducible Linux environment that is easy to maintain.