Knak Optimize

Let Knak review your emails and automatically flag issues

Felix Higgs avatar
Written by Felix Higgs
Updated over a week ago

Knak now has the ability to automatically scan your emails for common mistakes that may affect email deliverability and performance.

To enable this feature in your Knak account contact support or your customer success manager.

Optimize will appear as a new tab in the builder.

Optimize will check for the following issues for emails:


Reply-To Address - Checks if a valid reply-to email exists
From Address - Checks if a valid from address exists
Preview text - Checks if preview text has been added and is longer than 15 characters. (Short preview text is not recommended as it may not convey enough meaning to the recipient)

Email Preference Link - Checks to see if it has an unsubscribe or email preference center link

Email Size - Checks to see if the email is below 102kb.

Subject Line - Checks if a subject line exists

Out Of Date Modules - Checks if all modules used in the email are up to date.

Border Colour - Checks to see the colours used will work with Dark Mode

Border Thickness - Checks to see if borders are greater than 8px

Alternate Text - Checks to see if there is alternate text on every image

Content Links - Checks if all content links have link URLs added

Colour Contrast - Checks to see if there is low contrast between the background and text colours

Dark Mode Colour Choices - Check to see the selection of text and background colours used in Dark Mode

Text Over Background Image - Checks to see if there is contrasting text over top of an image.
Button Links - Checks if all button links have URLs added

Published Modules - Checks if all modules are published (not deleted or unpublished)

Alternate Text - Checks to see if there is alternate text on every image

Button Border - Checks to see if there's enough contrast on the border of the button.

Button Over Background Image - Checks to see if there's a button over a background image as rounded corners will be square on Outlook

The optimize tab will show you all items and whether each item has passed, warning or failed. Every issue will have a high or medium impact.

If any item has failed you can select 'highlight' to view the section of the email that has issues or select 'edit' to be taken to the relevant section to review and fix.

Configuring the Optimize Tab 

The tests under the Optimize tab can be configured so that a failed test will either produce a warning or completely block the email from being synced or downloaded.

With Alternate Text, you can set it to give a warning, ignore or error.

Need more help? Contact support via live chat within Knak using the chat bubble in the bottom right corner or email

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