Synology

Synology MailPlus 5 Licenses Email Server Package

4.3 (10 reviews)

Host your own secure, private email server on Synology NAS with five included user licenses.

$250.00*
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*Price sourced from Amazon.com. Last updated:Jun 28, 2026.Price and availability are subject to change.

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Overview

The Synology MailPlus 5 Licenses package extends the capacity of the MailPlus mail server application running on a Synology NAS. MailPlus gives businesses and advanced home users the ability to operate a fully self-hosted email server, keeping all messages, attachments, and metadata on hardware they physically control. This approach eliminates dependence on third-party email providers and the recurring per-user fees that come with them, while giving administrators direct oversight of data retention, security policies, and compliance requirements.

The MailPlus platform includes a polished web-based email client with an intuitive interface for managing messages, calendars, and contacts, along with dedicated mobile apps for Android and iOS that keep users connected on the go. Under the hood, a purpose-built search algorithm enables high-speed full-text indexing across all mailboxes, so finding a specific message among thousands is nearly instantaneous. For organizations that cannot afford email downtime, MailPlus supports a high-availability architecture in which a secondary Synology NAS mirrors the primary server and can take over automatically in the event of a failure. Each license pack adds five user accounts to your deployment, making it straightforward to scale as your team grows.

Key Features

A secure, private, and cost effective email solution

High-availability architecture maximizes the service uptime

Specially designed algorithm for high speed full-text search

Beautifully designed and intuitive mail client allows efficient email management

Cross-platform support on web client and dedicated mobile apps on Android/iOS

Specifications

Brand
Synology
Product Type
Mail Server License
Licenses Included
5 User Accounts
Compatibility
Synology NAS (with MailPlus Server package)
Client Access
Web Client, Android App, iOS App
High Availability
Supported (requires secondary NAS)
Search
High-Speed Full-Text Search

Pros & Cons

👍 Pros

  • Self-hosted email keeps all data on your own hardware, giving you full control over privacy and compliance
  • High-availability architecture supports failover to a secondary NAS for minimal service interruption
  • Intuitive web-based mail client with cross-platform mobile apps on Android and iOS
  • Built-in high-speed full-text search makes finding specific messages fast and efficient
  • No recurring per-user subscription fees once licenses are purchased

👎 Cons

  • Requires a compatible Synology NAS, adding hardware cost if you do not already own one
  • Initial setup and ongoing mail server administration demand more technical knowledge than hosted email services
  • Deliverability to external recipients depends on proper DNS, SPF, DKIM, and DMARC configuration by the administrator
  • Only five licenses per pack, so larger organizations need to purchase multiple packs

Frequently Asked Questions

It includes five email account licenses for the Synology MailPlus mail server application. The MailPlus Server package itself is free to install on compatible Synology NAS devices and comes with five free accounts; this license pack adds five more.
Yes. MailPlus is a package that runs exclusively on compatible Synology NAS hardware. It cannot be installed on third-party servers or general-purpose computers.
Users can access email through the MailPlus web client in any modern browser, as well as dedicated mobile apps available on both Android and iOS.
Yes. MailPlus features a high-availability architecture that allows a secondary Synology NAS to take over mail services if the primary server goes down, maximizing uptime.
Yes. MailPlus includes a specially designed algorithm for high-speed full-text search, allowing users to quickly find messages across their entire mailbox.