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Customize marketing email section styling

Last updated: August 26, 2026

Available with any of the following subscriptions, except where noted:

To further customize the design of your marketing emails, you can add rounded corners, borders, margins, and padding to individual sections. 

Add rounded corners to a section

  1. In your HubSpot account, click More, then navigate to Marketing > Email. If More doesn't appear in your account, navigate to Marketing > Email directly.
  2. Click the name of an existing email, or click Create email in the top right.
  3. In the email editor, click a section.
  4. To add uniform corner rounding: 
    • In the Rounded corners section of the sidebar editor, select the Apply to all sides checkbox.
    • In the Top left field, enter the corner radius in pixels that you want for all corners.
  5. To add unique rounding to each corner: 
    • In the Rounded corners section, enter the corner radius in pixels that you want in the Top left field.
    • Repeat for the Top rightBottom left, and Bottom right fields.

Please note: rounded corners will appear as square corners in Classic Outlook for Windows.

Screenshot of the sidebar editor in the marketing email editor. The Borders section is displayed, with the Rounded corners section highlighted.

Add a border to a section

  1. In your HubSpot account, click More, then navigate to Marketing > Email. If More doesn't appear in your account, navigate to Marketing > Email directly.
  2. Click the name of an existing email, or click Create email in the top right.
  3. In the email editor, click a section.
  4. In the Borders section of the sidebar editor, click the Border style dropdown menu and select a style.
  5. Enter the width in pixels of the border.
  6. To set the border's color, enter a hexadecimal value, or click the color picker and select a color.
  7. To select which sides of the section have the border, click TopRightBottom, or Left. Any combination of sides can be selected.

Screenshot of the sidebar editor in the marketing email editor. The Borders section is displayed, along with the border style options.

Adjust section margins and padding

  1. In your HubSpot account, click More, then navigate to Marketing > Email. If More doesn't appear in your account, navigate to Marketing > Email directly.
  2. Click the name of an existing email, or click Create email in the top right.
  3. In the email editor, click a section.
  4. To adjust the top and bottom padding of the section:
    • In the Borders section of the sidebar editor, select Apply to all sides if you want the same padding on the top and bottom.
    • In the Top field, enter a padding value in pixels. Repeat for the Bottom field if you are setting separate padding.
  5. To adjust the top and bottom margins of the section:
    • In the Borders section of the sidebar editor, select Apply to all sides if you want the same margins on the top and bottom.
    • In the Top field, enter a margin value in pixels. Repeat for the Bottom field if you are setting separate margins.

Screenshot of the sidebar editor in the marketing email editor. In the Borders section, the Padding & Margin settings are displayed.

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