Synology MailPlus 5 Licenses Enterprise Mail Server Permanent License

  • Brand: Synology
  • Model: MailPlus5Licenses
  • Weight: 0.01kg


Synology MailPlus Enterprise Mail Server License Pack


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. Construct a business-grade mail server with Synology MailPlus and stay connected with all your important emails anytime, anywhere.


Synology MailPlus license packs are designed for adding active email accounts on Synology MailPlus. By default, 5 licenses are installed on a MailPlus supported Synology NAS, and extra licenses can be purchased for additional email accounts according to business needs.



Licensing Plan

Synology MailPlus comes with 5 free email accounts and allows you to add more accounts with additional purchased licenses. We provide two kinds of license packs to suit your needs: 5 or 20 units of email accounts1, both with perpetual validity2. The included licenses can only be applied to one Synology NAS, and cannot be migrated3 to another Synology NAS once activated.
In addition, email aliases are not considered as email accounts and therefore do not require any license for use.


  1. Once the purchased license key is applied, all its included licenses will be activated at the same time.
  2. The activated licenses remain permanently valid unless the registered Synology NAS is down.
  3. For any special need for license migration, please contact us for further assistance.


High-availability Architecture

No additional fee will be charged for the high-availability support in MailPlus, and one cluster includes 10 free mail accounts by default. To have more licensed email accounts for use, you need to apply purchased license keys from Synology. For example, if you want to enable 25 email accounts in the high-availability cluster, then 15 additional licenses are needed.


MailPlus Web Client and Mobile App

MailPlus web client and its mobile app (available for Android? and iOS) do not charge fees for use, and they will be updated regularly for free with MailPlus Server.


License Activation and Account Management

To apply purchased license keys, you will have to log in to the Synology NAS as the administrator. Then, open MailPlus Server and go to License to apply the keys (Internet connection required). One license key can only be applied to one MailPlus supported Synology NAS.
To activate or deactivate email accounts, go to Account for management.

To check all your activated licenses, please log in to your Synology Account.


Sizing Recommendations

Model Maximum number of concurrent users Maximum Server Performance
FS3017 1800 4,773,000emails per day, approx. 145GB
FS2017 1100 4,471,000emails per day, approx. 136GB
FS1018 200 1,840,000emails per day, approx. 56GB
RS18017xs+ 800 4,235,000emails per day, approx. 129GB
RS4017xs+ 1100 4,312,000emails per day, approx. 131GB
RS3617xs+ 800 4,235,000emails per day, approx. 129GB
RS1619xs+ 450 3,363,000emails per day, approx. 102.6 GB
RS3617RPxs 500 3,595,000emails per day, approx. 109GB
RS3618xs 500 3,595,000emails per day, approx. 109GB
RS2818RP+ 150 1,484,000emails per day, approx. 45GB
RS2418+/RS2418RP+ 150 1,484,000emails per day, approx. 45GB
RS1219+ 100 936,000emails per day, approx. 28GB
RS818+/RS818RP+ 100 897,000emails per day, approx. 27GB
RC18015xs+ 600 3,847,000emails per day, approx. 117GB
DS3617xs 450 3,363,000emails per day, approx. 102GB
DS3018xs 200 1,909,000emails per day, approx. 58GB
DS2419+ 150 1,484,000emails per day, approx. 45 GB
DS1819+ 150 1,484,000emails per day, approx. 45 GB
DS1618+ 150 1,484,000emails per day, approx. 45GB
DS1019+ 100 1,052,000emails per day, approx. 32GB
DS918+ 100 1,052,000emails per day, approx. 32GB
DS718+ 100 1,052,000emails per day, approx. 32GB
DS218+ 50 623,000emails per day, approx. 19GB
DS418play 50 623,000emails per day, approx. 19GB


Applied Models

  • 19 series: RS1619xs+, RS1219+, DS2419+, DS1819+, DS1019+
  • 18 series: FS1018, RS3618xs, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS3018xs, DS1618+, DS918+, DS718+, DS418play, DS218+
  • 17 series: FS3017, FS2017, RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, RS3617xs, DS3617xs, DS1817+, DS1517+
  • 16 series: RS18016xs+, RS2416RP+, RS2416+, DS916+, DS716+, DS716+II, DS416play, DS216+, DS216+II
  • 15 series: RS815RP+, RS815+, RC18015xs+, DS3615xs, DS2415+, DS1815+, DS1515+, DS415+
  • 14 series: RS3614xs+, RS3614RPxs, RS3614xs, RS2414RP+, RS2414+, RS814RP+, RS814+
  • 13 series: RS10613xs+, RS3413xs+, DS2413+, DS1813+, DS1513+, DS713+
  • 12 series: RS3412RPxs, RS3412xs, RS2212RP+, RS2212+, RS812RP+, RS812+, DS3612xs, DS1812+, DS1512+, DS412+
  • 11 series: RS3411RPxs, RS3411xs, RS2211RP+, RS2211+, DS3611xs, DS2411+, DS1511+


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