Platform / Drag and drop builder

Design emails by dragging blocks

Build professional, responsive emails without HTML, a designer or extra tools. Drop in blocks, edit text inline and send.

Blocks you can use

Every block can be styled on its own: colours, fonts, padding and alignment.

Overview

Build emails like stacking blocks

Most email editors either limit you to rigid templates or expect you to write HTML. The GO MAILBOX builder sits in between: drag a block onto the canvas, click to edit, and see exactly what your subscribers will see.

The output is clean, responsive HTML that renders well in Gmail, Outlook and mobile apps. When you need full control, switch to HTML mode and edit the code directly.

How it works

Start from a template or blank

Pick a layout from the library or begin with an empty canvas.

Drag in blocks

Add headings, images, buttons and columns where you want them.

Style and edit inline

Change text, colours and spacing right on the canvas.

Save and send

Save as a template for next time, then send or schedule.

Key capabilities

Key capabilities

Everything you need to design on-brand emails.

Content blocks

Headings, text, images, buttons, columns, dividers and spacers.

Per-block styling

Set colours, fonts, padding and alignment for every block.

Responsive output

Emails adjust to phones, tablets and desktops automatically.

HTML mode

Switch to code view to paste or fine-tune your own HTML.

Save as template

Reuse any design for future campaigns.

See templates →

Personalisation tags

Insert subscriber names and custom fields anywhere.

Explore segmentation →
Who uses this

What teams build with it

From quick updates to full promotional layouts.

Newsletters

Regular updates with multiple stories and images.

Promotional emails

Sale banners, product grids and coupon codes.

Announcements

Simple, focused emails for news and launches.

Transactional templates

Order, receipt and reminder layouts for the API.

FAQ

Builder questions

Email Builder FAQ

  • Do I need to know HTML?

    No. Drag blocks like headings, images, buttons, columns and dividers into place and edit text inline.

  • Will my emails look right on mobile?

    Yes. Emails built with the builder are responsive and adjust to phone, tablet and desktop screens.

  • Can I paste my own HTML?

    Yes. Switch to HTML mode to paste or edit your own code when you need full control.

Start today

Your next campaign, in the inbox

Create a free account, import your list and send your first campaign. 14 days free, no credit card.