Creating and Editing Emails in Interspire

Interspire Email Marketer includes multiple editors to help you create and customize email content based on your workflow and preferences.

These editors are used to build and modify newsletters, email templates, autoresponders, and other content types. Each editor is accompanied by a separate plain-text input box, allowing you to provide both HTML and text versions of your email for improved deliverability.

Available Editors

Interspire provides three email editors:

Editor	Best For	Hosted Where	Key Features
TinyMCE	HTML editing, code imports, API content	Locally hosted	WYSIWYG UI, full HTML access
Unlayer	Visual design with structured components	Remotely loaded	Drag-and-drop interface, mobile-ready output
BuilderJS	Modern visual editing, self-hosted	Locally hosted	Drag-and-drop, inline CSS

These editors are available when creating:

Newsletters
Email templates
Autoresponders

In most other cases, say for exmple when creating dynamic content tags, the TinyMCE editor is used.

Choosing the Right Editor

When creating a new email or template, you’ll be prompted to select one of the available editors. Your choice depends on your workflow:

TinyMCE: Ideal for the WYSIWYG word processor style editor, and working with raw HTML or importing templates from external builders (e.g., Litmus, Stripo).
Unlayer: Best for drag-and-drop visual design with structured blocks.
BuilderJS: Recommended for users who want a modern visual builder that’s fully self-hosted unlike Unlayer that is remotely loaded.

⚠️ Editor selection is permanent per item. Once a newsletter, template, or autoresponder is created with an editor, you cannot change the editor for that item.

Plain-Text Version

Regardless of which editor you choose, every email can include a plain-text version as well. This version is critical for:

Improving deliverability
Supporting legacy or security-focused email clients
Providing a fallback when HTML cannot be rendered

See Text Editor for information on the plain‐text editor.

You can also validate your email, ensuring that it displays correctly in a variety of popular email clients.

See Validating an Email for information on checking how you email displays in popular email clients.

Email Preheader Text v8.7.2

Version 8.7.2 includes improved preheader text handling for better email client compatibility, particularly with Microsoft Outlook and mobile email clients.

What is Preheader Text?

Preheader text (also called “preview text”) is the snippet of text that appears after the subject line in email inboxes. It provides recipients with a preview of your email content before they open it, significantly impacting open rates.

Improvements in v8.7.2

The preheader implementation has been enhanced to:

Better Outlook compatibility - Improved rendering in Microsoft Outlook desktop and mobile versions
Spacer optimization - Adds proper spacing elements to prevent email body content from appearing in the preview

Best Practices for Preheader Text

To make the most of preheader text in your emails:

Keep it concise - Most email clients display 40-130 characters
Complement your subject line - Don’t repeat it; expand on the message
Include a call-to-action - Give recipients a reason to open
Test across clients - Preview text displays differently across email clients