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 2007 Windows 10
Outlook 2010 Windows 10
Outlook 2013 Windows 10
Outlook 2016 Windows 10
Outlook 2016 120 dpi Windows 10
Outlook 2019 Windows 10
Thunderbird Windows 10
Lotus Notes clients Windows 7 Pro Service Pack 1
Windows 10 Mail Windows 10 1803 <
Outlook Office 365 Windows 10

Mac OS

Client Operating System
Outlook 2016 10.12.6 (Yosemite)
Apple Mail 12 (Dark Mode) 10.14 (Mojave)
Apple Mail 13 10.15 (Catalina)
Apple Mail 13 (Dark Mode) 10.15 (Catalina)
Outlook 2019 (Dark Mode) 10.15 (Catalina)
Outlook Office 365 (Dark Mode) 10.15 (Catalina)

Web-based email

Our web-based email client results are opened on Windows 10 machines* using the following web browsers:

  • Internet Explorer 11
  • Firefox 68.0.2
  • Chrome 76

*Gmail results in Chrome and Firefox are opened on Windows 7 service pack 1 machines.

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
iPad Retina iOS 13.1
iPad Mini iOS 13.1
iPad Pro (10.5 & 12.9 inch models) iOS 13.1
iPad Pro (11 inch model) iOS 13.1
iPhone 6s iOS 10.3
iPhone 6S plus iOS 10.3
iPhone 7 iOS 11.3.1
iPhone 7 plus iOS 11.3.1
iPhone 8 iOS 12.0
iPhone 8 plus iOS 12.0
iPhone X iOS 11.3.1
iPhone SE iOS 11.3.1
iPhone SE (Gen 2) iOS 13.4.1
iPhone XS iOS 12.0
iPhone XS Max iOS 12.0
iPhone XR iOS 12.0
iPhone 11 iOS 13.0
iPhone 11 Pro iOS 13.0
iPhone 11 Pro (Dark Mode) iOS 13.0
iPhone 11 Pro Max iOS 13.0

iOS Apps

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

App Mobile Device Operating System
Gmail App iPhone 7 iOS 13.4.1
Microsoft Outlook App Version 3.14.0 iPhone 8 iOS 11.3.1

Android devices

We currently use Gmail accounts within the following clients:

Email Client Version Device Android Version
Android Gmail App 2020.04.26.310266462 Samsung Galaxy S6 Android 6.0 (Marshmallow)
Gmail (Android 7) 2020.04.26.310266462 Google Pixel Android 7.1.1 (Nougat)
Gmail (Android 8) 2020.04.26.310266462 Google Pixel 2 Android 8 (Oreo)
Gmail (Android 9) 2020.04.26.310266462 Google Pixel 3 Android 9 (Pie)

We currently use IMAP accounts within the following clients:

Email Client Version Device Android Version
Android Gmail App v 2020.04.26.310266462 (IMAP Account Setup) 6.0 Samsung Galaxy Nexus Android 6.0 (Marshmallow)
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)
Samsung Mail App 6.0 Samsung Galaxy S6 Android 6.0 (Marshmallow)
Samsung Mail (Android 7) 7.1.1 Samsung Galaxy S8 Android 7.1.1 (Nougat)

We currently use Office365 accounts within the following clients:

Email Client Version Device Android Version
Microsoft Outlook 4.1.82 Samsung Galaxy S6 Android 7.0 (Nougat)

Microsoft Outlook

Outlook for Microsoft Windows uses the Microsoft Word rendering engine to render emails. The table below shows the different rendering engines for the different versions of Outlook Litmus has to offer. Read more about Outlook rendering here.

Email Client Version Used
Outlook 2007 Word 2007
Outlook 2010 Word 2010
Outlook 2013 Word 2013
Outlook for Mac 2016 WebKit
Outlook 2016 Word 2016
Outlook for Mac 2019 WebKit
Outlook 2019 Word 2019

IBM Notes

Notes 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 8.5.

Screen resolution

We currently use 1366x768 resolution. PC-based desktop/webmail client and browser previews are on machines using 96 DPI unless noted.

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