Hey @tomalloyd 

Thank you so much for asking the Klaviyo Community for help with your email in Outlook.

Outlook sometimes skews HTML emails because all versions since Outlook 2007 use Microsoft Word to render HTML/CSS. Because of this, an email display may look slightly off in newer versions of Outlook from what you initially design and preview in Klaviyo. Check out the article i linked above as it gives further explanations to why this happens in Outlook. There are additional resources in the article to help you solve these challenges. Also check out these other community post about similar issues!

Thank you so much for being part of the Klaviyo Community!

That’s helpful thanks very much Stephen

Tom

i have the same issue but did some more tests to be sure something in klaviyo is the issue.

the images below are the exact same code on (1) klaviyo and (2) mailchimp. both send as test emails and opened in the latest version of outlook notice the big white lines on klaviyo version only.

Also tested sending the .html code using the PHP mail function, no issues or white lines on outlook either.

outlook version im using is Microsoft 365 Apps for enterprise

Klaviyo:

Mailchimp:
 

Hi @tomalloyd, I have the exact same issue with the lines. 

Can I ask if you found a solution or work around?

Thanks, Maartje