Glossary
A quick reference for the key terms used throughout this documentation and the Modular Mail application.
Campaign
Section titled “Campaign”A single, specific email that you have built to be sent. A campaign is created from a Template and contains all the content (text, images) for that email.
ESP (Email Service Provider)
Section titled “ESP (Email Service Provider)”A platform like Mailchimp, Klaviyo, or Campaign Monitor that is used to send bulk email campaigns to a list of subscribers. You import your final HTML from Modular Mail into an ESP for sending.
Header
Section titled “Header”The top portion of your email’s HTML code. In Modular Mail, this is everything from the <!DOCTYPE html> tag down to the opening <td> that contains your modules. It typically includes the <head> section and your opening <body> and layout tables.
Footer
Section titled “Footer”The bottom portion of your email’s HTML code. This is everything that comes after your modules, from the closing </td> to the final </html> tag.
Module
Section titled “Module”A reusable, independent block of content in an email. In Modular Mail, a module is usually a self-contained <table> block. Modules can be added, reordered, and deleted in a campaign.
Template
Section titled “Template”The master structure for your emails in Modular Mail. A Template is a collection of a Header, a Footer, and all the available Modules that can be used to build a Campaign.
CSS Inlining
Section titled “CSS Inlining”The process of automatically taking CSS rules from a <style> block and applying them directly to individual HTML elements using the style attribute. This is critical for ensuring consistent rendering across all email clients, especially those that ignore <style> blocks (like Gmail). Modular Mail handles this automatically on export.