Below is a list of some of the most popular email clients for Window, MacOS, Android and iOS as well as the protocols and features they support in SmarterMail. In addition to the protocols listed below, SmarterMail also supports synchronization using IMAP, POP, CalDAV and CardDAV.
In early 2017, Microsoft began deprecating the use and support of EAS in Outlook for Windows. However, EAS is still the industry standard for synchronizing mobile devices. In addition, Microsoft has ended support for Sharepoint Sync outside of its use with Microsoft 365 (Office). As a result, customers currently using either of these for synchronizing their accounts to Outlook for Windows should move to one of the supported protocols below.
It's worth noting, some clients show features as being Not Available (n/a). This is not a limitation of SmarterMail. The protocol simply doesn't support that particular feature for that client or the client itself lacks that feature. In addition, there are many more clients and applications available for email, calendars, contacts and more across all operating systems -- too many to list and provide complete capabilities. WebDAV is listed as it's the overall protocol which covers calDAV, cardDAV, etc.
| 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
+Some features require a Pro license of eM Client
| 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.
| 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
***SmarterMail supports EAS 16.1, but Outlook mobile uses EAS 14, so some features are not available in Outlook mobile