ContactMonkey's template builder is supported on most email clients. See below for a full breakdown and the level of support for each client.
Fully Supported
The email will display properly, fallback elements show for image backgrounds and web fonts.
Desktop:
Apple Mail 8, 9 & 10
Thunderbird
Airmail2
Microsoft Outlook for Mac 2011, 2016
Microsoft Outlook for Windows 2010, 2011, 2013, 2016 *, 2019 *
* Background images and web fonts are not supported
Mobile:
Android 4.4 Mail
Gmail App (iOS)
Gmail App (Android)*
iOS Mail (iPhone & iPad)
Outlook App (Android & iOS)**
Samsung Mail App (Android)
Yahoo App (Android & iOS)
* When using a Gmail account
** Will show the desktop version when using Microsoft email accounts
Web:
Gmail
G Suite
Inbox by Gmail
Outlook.com
Office 365
Yahoo
AOL Mail
Comcast
freenet.de
GMX.de (web version)
Mail.ru
Libero Mail
Tiscali
Virgilio
email.it
Web.de (web version)
Centrum.cz
Seznam.cz, Post.cz, Email.cz
Note: none of the above services supports web fonts
Partial support for some options
Messages display correctly, but some options (with low impact) may not display as expected.
Desktop:
Microsoft Outlook 2013 in high-resolution displays *
Microsoft Outlook 2016 in high-resolution displays **
Microsoft Outlook 2000, 2002 & 2003 ***
* Background images and web fonts are not supported. Applies a font resize that may expand the layout.
** Background images and web fonts are not supported. Applies a font resize that may expand the layout. The text is scaled at 200% by default in some devices.
*** Web fonts are not supported. Buttons don't display round corners. Social icons are not flexible.
Mobile:
Huawei Mail App (Android) *
* Icons in social content block appear vertically stacked (tested on app version 3.1.0.27)
Web:
qq.com *
Yandex.ru
Naver **
* Buttons don't display properly.
** Minor glitches on separators
Not yet supported
This list includes new and updated mobile email clients with compatibility issues.
Huawei Mail App (Android)
Only basic settings works
When sending to these clients, we recommend using text and images in a simple one-column layout.
Desktop:
Lotus Notes 7, 8 & 8.5
Windows 10 Mail
IBM Notes 9
Mobile:
Gmail App using IMAP accounts
Outlook.com in mobile browser (not the Outlook app)
Web clients (mobile versions)
Web:
T-online.de