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The MailPlus suite allows your business to set up a secure, reliable, and private mail server while giving your employees a web-based client for managing emails and boosting productivity.

Intuitive & Powerful MailPlus

MailPlus is an intuitive and powerful webmail client for organizing emails, checking company address books, and sharing mailboxes with work partners.

  • Search History and Operators

    Quickly find mail using search history and operators such as to:mailplus@synology.com and is:unread.

  • Priority Mailbox

    Shows emails from specific mailboxes or labels in one view for centralized management.

  • Shared Address Book

    When joining an LDAP server or Windows AD domain, MailPlus can make an address book accessible to all employees.

  • Shared Mailbox

    Share mailboxes with work partners to track projects together.

  • Push Notification

    Get browser notifications when emails arrive in to important mailboxes or with specific labels.

Integration with Collaboration Packages

MailPlus is seamlessly integrated with Synology Chat and Synology Calendar, making itself a hub of task communications and scheduling. With the Chat and Calendar plug-ins, you can dive into project discussions and add emails to your to-do list right from MailPlus.

  • Manage to-dos with Calendar task plug-in

    Schedule your work life with this versatile plug-in. You can view all your to-dos and add more directly from emails to Calendar, right in MailPlus.
  • Add events from emails to Calendar

    Click on a date/time in your emails to create a new Calendar event.
  • Communicate through Chat plug-in

    Start work conversations instantly while checking emails.
  • Manage to-dos with Calendar task plug-in
  • Add events from emails to Calendar
  • Communicate through Chat plug-in
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Reliable & Intuitive MailPlus Server

MailPlus Server transforms your Synology NAS into a reliable and intuitive mail server, making server management fast, intuitive, and hassle-free.

Multiple Domain Support

Host various email domains in a single MailPlus Server to centralize mails sent to your domains, and customize settings for every domain.  

Mail Migration & Configuration Import

Migrate external emails to MailPlus Server and reuse system configurations from Microsoft Exchange for quick system replacement.

Global Black & White Lists

Set up rules in one place to reject unwanted emails and allow through important messages.

Group/User Policies

Customize user and group policies on their login methods, daily email traffic, and mail delivery.

High-availability Design

Maximize mail service uptime during system upgrades and hardware replacements by switching the mail system to the paired server in seconds.


Assign sub-administrators to help manage MailPlus Server by function to greatly reduce IT manager’s workload. 

Robust security mechanisms

MailPlus Server comes with full-fledged security features to defend against malicious attacks.

Threat Monitor

Provides threat statistics of inbound and outbound mail, along with clear graphs for quick overview.

Anti-spam & Spam reporting

Detect spam with high-performance engine Rspamd at outstanding speed, and learn from reported spam for more accurate spam detection.

Anti-malware & Post-Audit

Provide strong anti-malware protection with Google Safe Browsing and industry-standard antivirus engines, and quarantine suspicious mails for post-auditing.

Advanced SMTP Security

Regulate SMTP client connections to defend against overload attacks, and limit outbound emails to keep users from being spam suspects.

Download and experience now

The MailPlus app is your mobile mail platform to manage mail on the go. It is now available for Android™ and iOS.