The Synology MailPlus Suite provides advanced and secure mail service with high usability. This suite consists of two packages: MailPlus Server and MailPlus. MailPlus Server is an administration console that offers diverse settings, while MailPlus is an email platform for client users.

With the Synology MailPlus Server package, your Synology NAS can serve as a mail system that supports SMTP, POP3, and IMAP. You can centrally manage user accounts and archive email messages on your Synology NAS. The Synology MailPlus package also provides DSM users with an easy-to-use and browser-based email client for viewing, managing, and sending messages.

Why use Synology MailPlus?

• Integration with Synology Chat, Synology Calendar, and Synology Contacts, makes MailPlus a hub for task communications, scheduling, and contact management. Dive into project discussions and add emails to your to-do list right from MailPlus.
• Migrate emails from Google Workspace/Exchange to MailPlus without password collection, and reuse system configurations from Exchange for quick system replacement.
• MailPlus Server’s high-availability design allows for the maximization of mail service uptime during system upgrades and hardware replacements by switching the mail system to a paired server in seconds.

• Make sure that your NAS is able to run MailPlus. For more details on selecting an appropriate Synology NAS to run MailPlus, you can refer to this article.
• To view the Maximum number of concurrent users and the Maximum Server Performance for your Synology NAS, you can refer to the “Sizing Recommendations” section of the MailPlus licensing page.

Before you can set up Synology MailPlus Server, you must first set up the following with a DNS service provider. Refer to this article for more details.

1. Buy and register a domain name with a DNS service provider.
2. Set up a MX record, an A record, and reverse DNS through your DNS service provider.
3. If you encounter any issues with this process, please contact your DNS provider for assistance.

1. Go to the Package Center to install Synology MailPlus Server.
2. Launch Synology MailPlus Server once the installation is complete.
3. In the wizard window, choose the option to create a new mail system.
   
4. Configure the following basic settings:
   

   Option	Description
   Account type	Select which account type (local, LDAP, or domain users) is allowed to use email services.
   Network interface	Select which LAN port should be used by MailPlus Server.
   Domain name	This will appear after the @ in users' email addresses. For example, if "mydomainname.com" is entered here, the email addresses of your users will be like "username@mydomainname.com".
   Volume	Select the volume, on which MailPlus Server and its data will be stored.

5. Follow the wizard to complete the setup process.

Purchase licenses

MailPlus license packs include five or 20 units of email accounts and can be purchased through Synology authorized resellers. For details on MailPlus license packs, refer to the MailPlus licensing page.

Install licenses

Purchased licenses must be installed to activate email accounts.

1. Go to License and click the Add button to add licenses.
   
2. In the Add License window, read the license agreement for MailPlus Server. After checking and confirming the content, click Agree.
3. Sign in to your Synology Account and click Next.
4. Enter the license number in the License Key field. If you need to add more than one license, click on the plus icon + to add more fields.
5. Confirm that the number of licenses to be installed and their respective license keys are correct. After confirming the information is correct, you can finish the setup.
6. After adding licenses, you can go to the License page to check the details and statuses of each license:
• License key
• The number of email accounts provided by each license
• License activation date
• License expiration date
• License validity status
7. At the bottom of the License page, you can view the total number of licenses installed on the MailPlus Server, as well as the number of used and unused licenses.

You must activate user accounts in MailPlus Server to start using mail services, and will need a sufficient number of licenses to do so.

Activate user accounts

1. Go to Account > User.
   
2. Select the users you want to activate. If the checkboxes under the Activate and Deactivate columns are not ticked for a certain user, the status of this user will be set to default. Ticking the Activate checkbox will reduce the number of available licenses.
3. The Activation Info column displays if a license has been applied to the user.
4. The Status column displays the following DSM user statuses: Normal, Disabled, and Username unsupported.
5. Click Apply to activate users.

Activate groups

You can easily activate and deactivate user groups here. Settings will be applied to all members within the same group.

1. Go to Account > Group to activate or deactivate a group.
   
2. Click Apply to activate users within the group.

Download Synology Contacts from the Package Center to manage address books and contacts. Synology Contacts provides the options of using shared or personal address books.

• Shared address book: Personal address books that others have shared with you can be viewed under this category.
• Personal address book: The address books under this category are owned by individual users.

For details on configuration and permission settings, refer to this article.

On the Security page, you can enable spam filters, anti-virus scanning, or block and allow lists to protect your Synology MailPlus Server and its clients. Refer to this help article or the Security White Paper for more details.

System configurations: Use Hyper Backup to back up mail system configurations to a Synology NAS compatible with Synology MailPlus Server. Details include the following:

• Domain
• Mail Delivery
• Service
• Security
• Auditing
• License
• Account

Mailboxs and emails: Use Shared Folder Sync to sync all mailboxes and emails to a Synology NAS compatible with Synology MailPlus Server.

For more details on backup and restoration, refer to this article.

• How to migrate emails from Microsoft Exchange to Synology MailPlus Server
• How to import system configurations from Microsoft Exchange to MailPlus Server

Software specs

• Full software specs for MailPlus Server can be found here.

Related articles

• Synology MailPlus Security White Paper
• Administrator's Guide for Synology MailPlus Server
• For more tutorials, FAQ’s, and other articles related to MailPlus, you can visit this page.