When creating campaigns from the new Studio and sending them as an email to Outlook, there are sometimes thin (1px) white lines bordering elements in the campaign.
- Studio | Campaigns - Templates
This is an issue with Microsoft Outlook inserting the 1px white lines across the template once it processes the email. It is expected that the email looks consistent with what is seen in Compose and what is received by end-users in support email clients.
This outlines our best-known workaround for this issue.
- Using Classic Studio to send the campaign can work.
Please check the current status of this issue on the Known Issues Tracker. (Issue ID: PUB-2140)