Email Builder
Drag, drop,
send.
Eleven block types. Merge tags for any contact field. Table-based HTML that renders in Gmail, Outlook, Apple Mail, and every client your subscribers actually use.
11 blocks · {{mergeTags}} · HTML mode for power users
11 block types
Every block you actually need
No marketing fluff. The blocks below cover 95% of newsletter, transactional, and cold outreach emails — and the remaining 5% you can drop in as raw HTML.
Three modes
Design, Preview,
HTML.
Most teams stay in Design mode. Some need HTML. MailerSpark lets you flip between all three without losing your work — Design → Preview checks the rendered output, HTML gives you the raw source.
- Design modeDrag blocks, set properties, reorder, edit copy. No code.
- Preview modeRenders the design in a real email-client canvas. No surprises in production.
- HTML modeEdit the raw table-based HTML directly. Power user territory.
Merge tags
Personalize with
any contact field.
Drop a {{firstName}} or {{company}} into any text or heading. MailerSpark also exposes your custom fields automatically — if you've added an `industry` field to your contacts, you can use {{industry}} in your email.
- Built-in fieldsfirstName, lastName, email, company, plus any custom field your org has defined.
- Default fallbacks{{firstName | there}} renders 'there' for contacts without a first name — no 'Hi ,' awkwardness.
- Custom field typingCustom fields are typed as text today. Type validation in the merge-tag picker.
Renders everywhere
Table-based HTML,
not divs.
Most drag-and-drop builders output divs and hope for the best in Outlook. MailerSpark outputs tables — the same approach Mailchimp and Postmark use — because it's the only thing that consistently renders across email clients.
- Tested in 30+ clientsGmail, Outlook (all versions), Apple Mail, Yahoo, AOL, mobile clients, dark mode.
- Dark mode awareRespects prefers-color-scheme: dark where supported, falls back gracefully where it doesn't.
- Inline CSSAll styles inlined — no <style> tags that get stripped by Gmail.
Every plan
The builder is in every plan.
Including the free plan. Build newsletters, transactional emails, and cold outreach step content with the same tool.