PostMaster review
A policy-focused email platform for organizations needing administration, monitoring, and security controls.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
PostMaster is an email server and management platform for mid-sized and large organizations. It combines SMTP, POP3, and IMAP mail services with browser-based administration, real-time activity monitoring, webmail, and controls for users, groups, domains, and aliases. Organizations can also manage email archiving and search, antivirus and anti-spam modules, attachment controls, and message-size restrictions. Its locally hosted focus suits teams that want direct control over email administration and policy enforcement, while hybrid integration supports organizations combining PostMaster with other email services.
Pricing is structured around vendor contact rather than published plan amounts. The current Enterprise edition is available by contacting QuantumLink Communications Pvt. Ltd., and a free plan and 30-day free trial are listed. Enterprise supports multiple locations and add-on modules for antivirus, anti-spam, archiving, reporting, workflow, and calendar management. The platform also connects with Microsoft Outlook, Microsoft Exchange, Office 365, and Google Apps. Calendar and scheduling capabilities include Outlook integration, giving organizations a path to connect email management with established productivity environments.
PostMaster’s strongest fit is for organizations that need a broad administrative and security layer rather than a narrow mailbox service. Data loss prevention, PGP/TLS encryption, two-factor authentication, archiving, filtering, and monitoring address governance and operational oversight, while hybrid integration can support mixed email environments. The trade-off is a web-only platform centered on locally hosted deployments, so organizations prioritizing mobile applications or a primarily cloud-based approach should consider alternatives. Teams seeking monitored, policy-driven email with multi-location support and detailed administration are the clearest match.
PostMaster pros and cons
- Where it wins
- Supports SMTP, POP3, and IMAP mail services
- Combines archiving, monitoring, filtering, and administration
- Includes DLP, PGP/TLS encryption, and two-factor authentication
- Where it doesn't
- Web-only access with no listed mobile apps
- Enterprise pricing requires contacting the vendor
- Primarily designed for locally hosted deployments
PostMaster fact sheet, pricing and score →
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