Mailu
Mailu is an easy-to-use, yet powerful mail server that comes as a Docker image. It is open source software, which means it's free (as in free beer and free speech), and is open to external contributions. The project aims to provide people with an easily configured, easily maintained, and full-featured email server without shipping proprietary software or unrelated features that are often found in popular groupware.
The main features include:
Standard email server with IMAP, IMAP+, SMTP, and Submission profiles for clients
Advanced email features: aliases and domain aliases. Custom routing
Webmails, multiple access to webmails, and administration interface
User features, aliases auto-reply and auto-forward. Fetched accounts
Admin features, global admins, announcements, per-domain delegation, quotas
Security, enforced, TLS, DANE MTA-STS Letsencrypt, outgoing DKIM Anti-virus scanner Snuffleupagus Block malicious attachments
Antispam, auto-learn, greylisting, DMARC& SPF, anti-spoofing
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Zentyal
You can join Windows® clients and manage them transparently. No disruption to your users and no device or user CALs. It comes with industry-standard SMTP/POP3/IMAP mail servers, built on the most trusted technologies and protocols. It provides reliable and secure Internet access. It also helps manage the basic network infrastructure services. Get software updates up to the EOL-date for each version, and support when needed. Zentyal provides an easy-to-use Windows Server®. It is natively compatible with Microsoft Active Directory®, allowing you to add Windows®, clients to your domain and manage them without causing any disruption to your users. Zentyal comes with industry-standard SMTP, POP3/IMAP mail servers that are built on the most trusted technologies and protocols. You can use Zentyal to host mail servers, domains and directory servers with mail, or as an all-in-one server.
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CacheGuard
CacheGuard product line is based on a core product called CacheGuard-OS. Once installed on a bare metal or virtual machine, CacheGuard-OS transforms that machine into a powerful network appliance . The resulted appliance can then be implemented as different types of Gateways to Secure & Optimize your network. See below a brief description of all CacheGuard appliances.
- Web Gateway: gain control over the Web traffic in your organization & filter unwanted Web traffic in your organization.
- UTM (Unified Threat Management) : secure your networks against all kind of threats coming from the internet with a Firewall, an Antivirus at the Gateway, a VPN server and a Filtering proxy.
- WAF (Web Application Firewall): block malicious requests on your critical Web applications and protect your business. The WAF integrates OWASP rules with the possibility to design your own custom rules. In addition, an IP reputation based filtering allows you to block IPs listed in real time blacklists.
- WAN Optimizer : prioritize your critical network traffic, save your precious bandwidth and get High Availability for your internet access through multiple ISP.
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ClearOS
An operating system and applications are included with your phone, tablet, or computer. Why not put them on your server as well? ClearOS is being redefined by HPE with the introduction of HPE ProLiant servers. ClearOS is an open-source, affordable operating system that is simple and easy to use. It features a graphical web-based user interface, an application marketplace, and over 100 apps. There are more being added daily. Open source software allows you to choose the applications you want and only pay for what you use. ClearCenter and HPE make it possible for small, home-based, remote, or branch offices to have a server available immediately, without additional cost. ClearOS and HPE ProLiant combine to offer a simple, secure, and affordable experience. It's never been easier to create the IT solution that's right for you.
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