Which browsers/operating systems/platforms are used on Litmus?

Litmus runs its tests on whichever platform is most appropriate for a particular client. There are some exceptions, due to licensing constraints, where Litmus may use a slightly older or newer version of an operating system to offer better, cheaper and faster testing to our customers.

Microsoft Windows

Client Operating System
Outlook 2000-2003 Windows 7 Pro Service Pack 1
Outlook 2007 Windows 7 Pro Service Pack 1
Outlook 2010 Windows 7 Pro Service Pack 1
Outlook 2013 Windows 7 Pro Service Pack 1
Outlook 2016 Windows 7 Pro Service Pack 1
Thunderbird Windows 7 Pro Service Pack 1
All Lotus Notes clients Windows 7 Pro Service Pack 1
Windows 10 Mail Windows 10 Anniversary Update

Mac OS

Client Operating System
Outlook 2011 10.10 (Yosemite)
Outlook 2016 10.10 (Yosemite)
Apple Mail 9 10.11 (El Capitan)
Apple Mail 10 10.12 (Sierra)

Web-based email

We open web-based email clients in the Windows versions of the following web browsers:

  • Internet Explorer 11
  • Firefox 52
  • Chrome 57

iOS devices

The table below shows the mobile device and its operating system. We use the native mail application included for each mobile device.

Mobile Device Operating System
iPhone 5S iOS 7 and iOS 8
iPad Retina iOS 10.3.2
iPad Mini iOS 10.3.2
iPad Pro iOS 10.3.2
iPhone 6 iOS 8
iPhone 6 plus iOS 8
iPhone 6s iOS 9
iPhone 6S plus iOS 9
iPhone 7 iOS 10.3.2
iPhone 7 plus iOS 10.3.2

iOS Apps

The table below shows the app, mobile device, and operating system.

App Mobile Device Operating System
Gmail App iPhone 7 iOS 10.3.2
Google Inbox App iPhone 7 iOS 10.3.2

Android devices

We currently use Gmail accounts within the following clients:

Email Client Version Device Android Version
Android Gmail App 5.7.105901136 Samsung Galaxy S6 Android 6.0 (Marshmallow)

We currently use IMAP accounts within the following clients:

Email Client Version Device Android Version
Android Gmail App (IMAP Account Setup) 4.4.4 Samsung Galaxy Nexus Android 4.4.4 (KitKat)
Android 4 Email App 4.4.4 Samsung Galaxy Nexus Android 4.4.4 (KitKat)
Android 5 Email App 5.1 Samsung Galaxy S6 Android 5.1 (Lollipop)
Android 6 Email App 6.0 Samsung Galaxy S6 Android 6.0 (Marshmallow)

Microsoft Outlook

Outlook decides which version of Internet Explorer to use based on the version that operating system has installed. The table below shows the version used by Litmus for each version of Outlook. Modern versions of Outlook (2007, 2010, 2013) use MS Word to render the emails, which differs from earlier versions. Outlook for Mac 2011 uses WebKit. Read more about Outlook rendering here.

Email Client Version Used
Outlook 2000 Internet Explorer 8
Outlook 2002 Internet Explorer 8
Outlook 2003 Internet Explorer 8
Outlook 2007 Word 2007
Outlook 2010 Word 2010
Outlook for Mac 2011 WebKit
Outlook 2013 Word 2013
Outlook for Mac 2015 WebKit

IBM Notes

Notes 8/8.5 selects its rendering engine from the operating system’s installed version of Explorer. Litmus uses Internet Explorer 8 on any machine running Lotus Notes 8/8.5.

Screen resolution

We currently use 1366×768 resolution. PC-based desktop/webmail client and browser previews are on machines using 96 DPI unless noted.

Need more help?

Ask the world's largest community of email designers.

Post a discussion in the Litmus Community