White line issues in Email Templates

Hi @jasbirka ,
Is this an issue appearing in Outlook emails? If so, its a common issue that unfortunately has no solution. Here are the notes I have on the issue:
A White Line Is Appearing Within Emails In Outlook Clients

For the white lines in Outlook, this is a known bug in the email community with no working solution that can be applied to a template.

That line (sometimes these lines) will appear randomly, not all the time, not always at the same place, and it will be worse when dark background colours are used (just because it’s more visible). One trick that sometimes works is playing with the font size and line height in an editable zone near where a line appears.

Sometimes, increasing or decreasing by 1px will eliminate the line. Sometimes, adding a <br> (where it’s possible to do it) can also help.

Doing a little research on the web will give you a list of tricks you can try. But none work on the template level; I spend hundreds of hours trying to find a solution, and nothing works...

When I say it’s not possible to fix it at the template level, it’s because the line will always randomly appear at different places and not all the time. It’s really a bug Microsoft never fixed, and it’s worse in the newer versions.

I have noticed that some clients have their own idea of what to do with <p> elements, and can tend to add spacing.

I have had more consistent luck using the "Single Line" spacing in the Marketo text editor (which places text in divs), and manually adding blank lines where needed. But YMMV.

Could you provide some screenshots of the issue you're seeing here and maybe share out the relevant code for those sections? That'd certainly help to diagnose the issue.

If you've got your Root Block Elements for the Email Rich Text Editor set to "<p>" instead of "none" that could also explain this behavior. Check Admin > Email > Text Editor Settings > Editor Settings to adjust this setting.