Synology MailPlus

Synology MailPlus

Improve team efficiency with an on-premises email solution that ensures data ownership, security, and reliability.

Work faster

Take the pain out of email management with a highly customizable webmail client.

Priority mailboxes

Set up mailboxes based on advanced filters and custom labels to keep abreast of what matters to you.

Single message view

Turn off conversation mode and split email threads into separate messages to work the way you are used to.

Shared mailboxes

Invite work partners to share the same mailbox and make progress on projects together.

Priority mailboxes
Single message view
Shared mailboxes

Easy-to-manage mail server

Centralize your email administration to ease the burden on IT staff.

Multiple domain support

Multiple domain support

Host multiple email domains on a single server and configure each independently.

Group/user policies

Group/user policies

Configure different login methods, daily email traffic quotas, email delivery, and other policies for users and groups.



Assign administrative rights by function to distribute the administrative workload.

Mailbox quotas

Mailbox quotas

Impose individual limits on user mailbox sizes and send out reminders.

Robust security

Protect your digital communications from external threats with first-class security features. Learn more

Threat monitoring

Visualize the threats against your team's inbound and outbound emails in simple and clear charts.

Malware protection

Identify viruses or other malware with Google Safe Browsing and industry-standard antivirus engines.

Spam prevention

Detect spam and learn more about email threats with the high-performance Rspamd engine.

Advanced SMTP security

Regulate SMTP requests to avoid overload attacks and limit outbound emails to prevent spam flagging.

Privacy and availability

Comply with data protection regulations and boost service availability to shield your business from costly interruptions.

Guarantee the right to be forgotten

Search across multiple email accounts and preview email content to identify and remove email marked for deletion more efficiently.

Keep services online

Keep Synology MailPlus Server online with Synology MailPlus High Availability or leverage Synology High Availability (SHA) to ensure system-wide availability of all services running on Synology NAS.

Guarantee the right to be forgotten
Keep services online

Boost productivity

Increase productivity by integrating Synology MailPlus with the other tools in Synology's productivity suite.

Synology Calendar

Click on dates displayed in emails to automatically create events in Synology Calendar. Learn more

Synology Contacts

Choose the right address from your Synology Contacts address books as you type in the recipient's field. Learn more

Synology Chat

Start chats with work partners directly from MailPlus with the Synology Chat plug-in. Learn more

Discover how organizations worldwide use MailPlus


Visual effects studio RISE adopted MailPlus for over 190 employees across multiple branches.

  • Fast and scalable storage
  • High-availability architecture to ensure minimum downtime

Film marketing and distribution company CMC leverages MailPlus to connect its distributed workforce.

  • 2-3x saving on the overall deployment costs
  • Compliance with email security and scalability requirements

Transparent pricing without recurring fees

Total cost of ownership for MailPlus is easy to calculate. Simply estimate your number of users and daily email volume. Check our sizing recommendations to decide which Synology NAS is right for you.

Only pay for active users

MailPlus Server, client, and companion apps are free, with licenses only needed for active users. Perpetual licenses are a one-off purchase and can be added in small increments whenever needed.

Lifetime upgrades and updates

Leverage new features and functionalities in MailPlus and its companion apps, as well as security updates, for as long as your hardware supports it, no matter when you purchased your licenses.

Unlimited license migration

Licenses can be transferred freely between specific end user accounts or mailboxes1 and always remain valid — even if you migrate to new Synology hardware. Learn more

Looking to migrate from another platform?

Browse emails wherever you are

Make MailPlus your platform of choice for on-the-go emailing. Available for Android and iOS.

Browse emails wherever you are


  1. Licenses are activated and managed through a single Synology Account, and cannot be transferred to another account after activation.