Knak

Builder emails work across many desktop, mobile, and web email clients. Compatibility varies by client. Some clients support all features. Others support only basic layouts.

Use our <a href="https://help.knak.io/en/articles/6871541-email-testing">Email Testing Feature</a> to review how your email displays across different email clients.

___________________________________________________________

These email clients support most Builder features. Layouts display correctly. Fallback fonts appear when web fonts are not supported.

Note: Web fonts are not supported in many Outlook environments. Microsoft Outlook versions after 16.79.3 (December 2023) no longer support web fonts.

Note: Web fonts are not supported in these web-based email services.

These clients display the email correctly. Some design options may not appear exactly as expected.

These clients currently have compatibility issues.

These email clients support basic email rendering. Advanced design elements may not display correctly.

Use a simple one-column layout. Use text and images only when sending to these clients.

- Thunderbird
- Lotus Notes 7, 8, 8.5
- Windows 10 Mail
- Windows 11 Mail
- IBM Notes 9, 10

- GMX.de
- Web.de
- free.fr
- freenet.de
- Libero Mail

Web email clients opened in a mobile browser

- Web email clients opened in a mobile browser

Follow these recommendations to improve email rendering:

Test emails across devices before sending.

Use fallback fonts when using web fonts.

Avoid complex multi-column layouts for unsupported clients.

- Use our <a href="https://help.knak.io/en/articles/6871541-email-testing">Email Testing Feature</a> to review how your email displays across different email clients.
- Test emails across devices before sending.
- Use fallback fonts when using web fonts.
- Avoid complex multi-column layouts for unsupported clients.

Need more help? Contact support via live chat using the chat bubble in the bottom right corner or email <a href="mailto:support@knak.com" rel="nofollow noopener noreferrer" target="_blank">support@knak.com</a>.

Understand which email clients work with Builder emails and what level of support you can expect.

Email Client Support

Find answers and get help from Intercom Support and Community Experts

This site employs cookies and other technologies that we and our third party vendors use to monitor and record personal information about you and your interactions with the site (including content viewed, cursor movements, screen recordings, and chat contents) for the purposes described in our Cookie Policy. By continuing to visit our site, you agree to our {websiteTermsLink}, {privacyPolicyLink} and {cookiePolicyLink}.

This site uses cookies and similar technologies ("cookies") as strictly necessary for site operation. We and our partners also would like to set additional cookies to enable site performance analytics, functionality, advertising and social media features. See our {cookiePolicyLink} for details. You can change your cookie preferences in our Cookie Settings.

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See our {cookiePolicyLink} for more details.

Advertising cookies are set by our advertising partners to collect information about your use of the site, our communications, and other online services over time and with different browsers and devices. They use this information to show you ads online that they think will interest you and measure the ads' performance. Social media cookies are set by social media platforms to enable you to share content on those platforms, and are capable of tracking information about your activity across other online services for use as described in their privacy policies.

These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.

These cookies are necessary for the website to function and cannot be switched off in our systems.

These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site.

You have the right to opt out of the sale of your personal information. See our {cookiePolicyLink} for more details about how we use your data.

Your Privacy Choices

We use cookies to enhance your experience. You can customize your cookie preferences below. See our {cookiePolicyLink} for more details.

Cookie Settings

Empty Help Center

Uh oh. That page doesn’t exist.

Home

Search results

Disappointed

Neutral

Smiley

Thinking...

Searching through sources...

Analyzing...

Tickets submitted through the messenger or by a support agent in your conversation will appear here.

Email Client	Supported Versions	Notes
Apple Mail	13, 14, 15, 16	Full support
Microsoft Outlook (Windows)	2007, 2010, 2013, 2016, 2019, 2021, Microsoft 365	Full support
Microsoft Outlook (Windows) – New Outlook	Microsoft 365	Full support
Outlook for Mac	Microsoft 365	Web fonts not supported
Outlook for Mac	Version 16 (Legacy Outlook)	Web fonts not supported

Email Client	Platform	Notes
iOS Mail	iPhone, iPad	Full support
Gmail App	iOS	Web fonts not supported
Gmail App	Android 8–13	Web fonts not supported
Outlook App	iOS, Android	Web fonts not supported
Yahoo App	iOS, Android	Web fonts not supported

Email Client	Limitation
Microsoft Outlook (Windows) on high-resolution displays	May resize fonts. Layout may expand slightly. Web fonts not supported

Email Client	Platform
Huawei Mail App	Android

Email Client Support

Overview

Fully Supported Email Clients

Desktop Clients

Mobile Clients

Web Email Clients

Partial Support for Some Features

Desktop

Not Yet Supported

Only Basic Settings Supported

Desktop

Web

Mobile

Best Practices for Compatibility