Community Knowledge Base

SmarterMail Add-ons

SmarterTools' add-on licensing system allows users to enhance the functionality of SmarterTools products. Information about the add-ons available for your installation, purchasing and/or activating add-ons can be found on the Licensing and Activate page of this online help.

The following add-ons are available for SmarterMail:

  • EAS (Microsoft Exchange ActiveSync)
  • MAPI (Messaging Application Programming Interface)/EWS (Exchange Web Services)
  • Message Sniffer
  • Cyren Premium Antispam
  • Cyren Zero-hour Antivirus


EAS is a data synchronization protocol that enables over-the-air access to email, calendars, tasks and notes from most mobile devices, including Android, Blackberry, iOS and Windows Phone devices. In addition, EAS enables SmarterMail users to have access to their email, calendars, tasks, and notes while working offline. Finally, Windows Mail, People and Calendar all support EAS for syncing mail, contacts and calendars.


MAPI provides users with native Microsoft Outlook synchronization and functionality at the server level. Available for Outlook 2016 and above, MAPI offers standard functionality such as syncing emails, calendars, contacts, tasks and notes, but also additional functionlity that is available when connecting Outlook to Microsoft Exchange.

EWS seamlessly syncs SmarterMail messages, contacts, calendars and tasks to third-party email clients, including Apple Mail for MacOS and eM Client for Windows. EWS allows for fast communication between an email client and the mail server.

Message Sniffer

Message Sniffer complements SmarterMail’s built-in antispam and antivirus features and accurately captures more spam, viruses, and malware when combined with SmaterMail's "out of the box" protection. It learns about your environment automatically to optimize its performance and accuracy without your intervention; and it can be easily customized to meet your requirements. Because Message Sniffer runs all of its signatures locally, it doesn’t need to communicate with any services outside of the mail server, making it quicker and more efficient. Furthermore, the database is regularly and automatically updated to protect against new spam and malware attacks.

Cyren Premium Antispam

The Cyren Premium Antispam add-on is a service that uses Recurrent Pattern Detection (RPD) technology to protect against spam outbreaks in real time as messages are mass-distributed over the Internet. Rather than evaluating the content of messages, the Cyren Detection Center analyzes large volumes of Internet traffic in real time, recognizing and protecting against new spam outbreaks the moment they emerge.

Cyren Zero-hour Outbreak Detection

The Cyren Zero-hour Outbreak Detection add-on is a service that identifies new, "zero hour" viruses based on their unique distribution patterns and provides a complementary shield to conventional AV technology, protecting in the earliest moments of malware outbreaks and continuing protection as each new variant emerges.