Client/Protocol Breakdown

For optimal email hosting, secure communication, and seamless synchronization across Windows, Linux, and mobile devices, SmarterMail supports multiple industry-standard protocols, ensuring maximum compatibility and performance.

Numerous email, calendar, and contact management applications exist across all operating systems, far too many to list individually. The most popular are included below. WebDAV is included as it encompasses CalDAV for calendar sync, CardDAV for contact management, and other essential collaboration features.

Windows Desktop Clients

Feature Outlook 2021 Outlook 2019 Outlook 2016 eM Client Windows Mail*
Email Folders MAPI MAPI MAPI EWS EAS
Contacts MAPI MAPI MAPI EWS/WebDAV EAS
Delegation MAPI MAPI MAPI EWS n/a***
Contact Groups MAPI MAPI MAPI EWS n/a
GAL** MAPI MAPI MAPI EWS EAS
Primary Calendar MAPI MAPI MAPI EWS/WebDAV EAS
Secondary Calendar MAPI MAPI MAPI EWS EAS
Tasks MAPI MAPI MAPI EWS/WebDAV n/a
Notes MAPI MAPI n/a EWS/WebDAV n/a
Shared Folders MAPI MAPI MAPI EWS IMAP
Shared Contacts MAPI MAPI MAPI EWS n/a
Shared Calendars MAPI MAPI MAPI EWS n/a
Shared Tasks MAPI MAPI MAPI EWS n/a
Shared Notes MAPI MAPI MAPI EWS n/a
Room Scheduling MAPI MAPI MAPI EWS n/a
Contact Groups MAPI MAPI MAPI EWS n/a
Public Folders MAPI MAPI MAPI EWS n/a
Synced Categories MAPI MAPI MAPI EWS n/a
Autodiscover MAPI MAPI MAPI EWS EAS

* Includes People and Calendar applications for Windows 10

** GAL works on search and/or autocomplete only

*** Not Available (n/a) indicates a restriction of the protocol itself or the client lacking specific functionality.

+Some features require a Pro license of eM Client

macOS Desktop Clients

Feature Outlook 2019 Mac Mail*
Email Folders EWS EWS
Contacts EWS EWS/WebDAV
Delegation EWS n/a***
Contact Groups** n/a n/a
GAL EWS EWS
Primary Calendar EWS EWS
Secondary Calendar EWS EWS
Tasks EWS n/a
Notes EWS EWS
Shared Folders EWS n/a
Shared Contacts EWS n/a
Shared Calendars EWS n/a
Shared Tasks EWS n/a
Shared Notes EWS n/a
Domain Calendars EWS n/a
Public Folders EWS n/a
Synced Categories EWS n/a
Autodiscover EWS EWS

* Includes Calendar, Contacts and Notes applications for macOS

** Contact Groups in Outlook for Mac and Apple Mail are not supported due to limitations of the clients.

*** Not Available (n/a) indicates a restriction of the protocol itself or the client lacking specific functionality.

Mobile Clients

Feature iOS Mail* Gmail (Android) Samsung Mail** Outlook (iOS / Android)
Email Folders EAS EAS EAS EAS
Contacts EAS/WebDAV EAS/WebDAV EAS/WebDAV EAS
GAL EAS EAS EAS EAS
Primary Calendar EAS EAS EAS EAS
Secondary Calendar EAS EAS EAS EAS
Tasks EAS n/a*** EAS n/a
Notes EAS n/a n/a n/a
Shared Folders EAS EAS EAS EAS
Shared Contacts EAS n/a EAS n/a
Shared Calendars EAS EAS n/a n/a
Shared Tasks EAS n/a EAS n/a
Shared Notes EAS n/a n/a n/a
Domain Calendars n/a n/a n/a n/a
Synced Categories n/a n/a EAS n/a
Autodiscover EAS n/a EAS EAS

* Includes iOS Calendar, Contacts, Reminders and Notes apps

** Includes Samsung Calendar and Contacts apps

*** Not Available (n/a) indicates a restriction of the protocol itself or the client lacking specific functionality.

SmarterMail supports EAS 16.1, but Outlook mobile uses EAS 14, so some features are not available in Outlook mobile

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