Mail Server
Self-hosted business email on Linux
A complete self-hosted business mail platform on Linux
A mail server is more than SMTP delivery. It is the platform that receives mail, routes it, filters it, stores it, secures access to it, and gives users a reliable way to work with it every day.
Our Mail Server solution delivers a complete Linux-based messaging platform designed for business use. It combines secure mail transport, mailbox access, spam and malware filtering, browser-based webmail, and the operational support needed to keep the system dependable over time.
Built around proven open source mail components
Our solution is built on Postfix, Dovecot, Amavis, SpamAssassin, ClamAV, Postgrey, and Roundcube. Each part has a clear role. Postfix handles message transport, Dovecot provides mailbox services, Amavis ties filtering together, SpamAssassin scores unwanted mail, ClamAV scans for malware, Postgrey adds greylisting protection, and Roundcube gives users a clean webmail interface.
Together, these technologies create a mail platform that is flexible, transparent, and well suited to organizations that want a Linux and open source alternative to closed mail appliances or outsourced black-box systems.
Designed for secure delivery and cleaner inboxes
Business email has to do two jobs at once. It must to deliver legitimate mail reliably, and it has to reduce the noise and risk that come from spam, malware, and abusive senders. That is why this platform is designed as a layered system rather than a basic mail daemon with a mailbox attached.
The result is a mail server that supports secure transport, structured filtering, user access through standard mail protocols and webmail, and a much stronger day-to-day experience for both users and administrators.
A strong fit for organizations that want control
Our mail server offering is a good fit for businesses that want more visibility and operational control over how mail is handled, and where it is stored. That may mean self-hosted business email, a secure mail platform for internal or customer-facing use, or a Linux-based messaging system that can be integrated into broader infrastructure and security practices.
We deploy the platform properly, align it with your business’s access and filtering requirements, and support it as a real production service rather than a one-time setup.
Postfix is the SMTP engine at the front of the platform. It supports TLS for encrypted mail transport, SASL authentication, virtual domain hosting, address rewriting, and content inspection integration, which makes it a strong foundation for business mail delivery and relay control.
Dovecot provides the mailbox layer, including IMAP and POP3 access for users, LMTP for mail delivery workflows, and ManageSieve support where mailbox-side filtering is needed. Dovecot is built on strong security design, efficient operation, and suitability for both small and large installations, which makes it a reliable fit for your production mail platform.
Amavis acts as the content-filtering layer that ties the mail flow into spam and antivirus checks, while SpamAssassin provides the actual spam-scoring engine. SpamAssassin uses a weighted scoring framework that combines header and body analysis, Bayesian filtering, DNS blocklists, and collaborative filtering data to classify suspicious mail more intelligently than simple block-or-allow rules alone.
ClamAV adds antivirus protection at the mail gateway layer. It is widely used for email scanning and includes a multi-threaded scanning daemon plus automatic signature updates, which makes it a practical fit for continuously checking inbound and outbound content for malicious payloads.
Postgrey adds an optional extra layer of abuse reduction by using greylisting with Postfix policy services. In practice, this helps reduce a meaningful amount of low-quality spam and automated junk by temporarily rejecting unfamiliar delivery attempts and allowing standards-compliant senders to retry properly.
Users need more than backend mail flow. They need straightforward access to their mail. Dovecot supports standard mailbox protocols for desktop and mobile mail clients, and Roundcube provides a browser-based interface with MIME support, address books, folders, message search, and spell checking. Of course, users can continue using their existing email clients such as Outlook and Thunderbird.
The value of this stack is not just in the individual components. It is in how they work together to support transport security, mailbox access, spam and malware filtering, and user-facing usability in one coherent Linux platform. This makes it easier to shape the mail system around real business policy instead of accepting the defaults of a closed service.
Managed mail operations, not just server deployment
A mail server only creates long-term value if it stays secure, deliverable, well-filtered, and usable for the people who depend on it. Once in production, it needs ongoing attention to queue health, filtering behavior, user access, certificate management, patching, and overall service reliability.
That is what Starnix provides. Our managed mail server service is built to keep the platform operating as a dependable business system, not just to get the software installed and handed off.
What our managed support includes
Our support is built around the realities of running production email infrastructure.
- Mail server deployment and maintenance
- Postfix, Dovecot, and Roundcube administration
- Spam and malware filtering oversight
- Queue, delivery, and mailbox troubleshooting
- User, mailbox, and access management
- TLS certificate and authentication support
- Monitoring, alerting, and issue response
- Patch management and security maintenance
Support for both delivery quality and user experience
Mail support has to balance the infrastructure side and the user side. It is not enough for the server to be technically up. Messages have to move reliably, filtering has to stay effective, users have to be able to connect cleanly, and administrators need visibility into what the platform is doing.
We support the full service with that balance in mind, so the mail system remains trustworthy for both end users and technical staff.
Built for Linux environments and business communication needs
Our product is grounded in Linux and open source infrastructure, which aligns naturally with Starnix’s strengths. At the same time, it is designed for a very practical business goal: reliable, secure email that is easier to understand and support than a loosely assembled stack.
The result is a mail server offering that feels technically credible to experienced administrators while remaining clear and approachable for organizations that simply need a dependable business mail platform.