Synology MailPlus 5 Licenses Mail Server Software

Synology MailPlus 5 Licenses enables you to run a fully self-hosted email server directly on your Synology NAS, providing five user accounts for your organization. By keeping email on your own hardware, you maintain complete control over your data — messages are stored locally rather than on third-party cloud servers, addressing privacy and data sovereignty concerns that are increasingly important for businesses handling sensitive communications. The package includes access to the MailPlus webmail client, giving users a modern, browser-based interface for managing their email without the need for separate desktop software.

Setting up MailPlus Server requires a compatible Synology NAS and proper configuration of your domain's DNS records, including MX, SPF, DKIM, and DMARC entries to ensure reliable email delivery. While this initial setup is more involved than signing up for a hosted email service, the long-term benefit is the elimination of recurring per-user subscription fees and complete independence from third-party providers. If your team grows beyond five accounts, additional license packs can be purchased and applied to expand capacity. For small businesses, home labs, or organizations with strict data residency requirements, MailPlus offers a compelling self-hosted alternative to cloud email platforms.