For agencies

Email templates your clients can't break.

Build the template system once. Define the content fields. Hand the client their own workspace. They self-serve campaign creation from the modules you locked. Your design stays intact. Your team stops being the bottleneck.

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The problem

The agency handoff problem, in three parts

If you build email templates for clients, you've almost certainly hit at least one of these.

Tickets for tiny edits

The client needs a banner changed. A subject line is wrong in a template. A CTA button colour needs updating. Every small request comes back to your team, and the work never scales.

Clients breaking the design

You hand over edit access and the client changes fonts, deletes padding, or overwrites a module. They don't know they've broken it until you see the send. The client blames the template.

Work that doesn't scale

Your best templates are custom builds. But the production model depends on your team being in the loop for every campaign. The design quality doesn't translate into margin.

The handoff story

Build it once. Hand it over. Stay out of the inbox.

Agencies build great email templates. The problem comes after delivery.

Scenario one: the client can't edit them safely, so every small change becomes a support ticket. The banner needs updating for a promotion. The CTA text needs changing. The footer address has moved. Each one is trivial work for your team, but it's still your team's time.

Scenario two: you hand over HTML access so the client can self-serve. They edit the template. Something breaks. A font changes. Spacing disappears. The layout collapses on mobile. The client sends the broken email, notices after the fact, and the conversation turns toward the quality of the template.

Neither outcome is good for your agency's positioning or your margins.

Modular Mail solves both. You build the template system and lock it. The client gets a workspace where they can only edit the content fields you defined: text, images, links, CTAs. They cannot touch the structure. They cannot break the layout. They cannot drift from the brand.

The client self-serves campaign production. Your team moves on to higher-value work. The design you delivered stays exactly as it was.

If you also need to convert Figma designs into production-ready email code, our Figma to HTML email conversion service handles that for you.

How it works

Set up the system. Hand over the keys.

Three stages from a Figma file to a client who builds their own campaigns.

  1. 01

    Build the client's template library

    Convert the client's Figma designs or existing HTML into a locked module library in Modular Mail. Or send us the designs and we handle the build. See the Figma to HTML service.

  2. 02

    Define the content fields

    Mark up each module with mm-editable tags to define exactly what the client can change: headline text, body copy, images, CTA links. Everything else is locked.

  3. 03

    Hand over the keys

    The client gets access to their own Modular Mail workspace. They see their modules, their content fields, and nothing else. They build campaigns. You stay out of the day-to-day.

What clients see

A clean editor, not your codebase.

Your client sees their module library, their brand, and content fields. They don't see HTML, template structure, or anything they could break.

The guardrails are invisible to the client. They feel like they have full control. You know the design is protected.

  • Client-specific module library
    Each client sees only their own modules and brand tokens.
  • Locked template structure
    Your design decisions stay intact. Clients can't break the layout.
  • Content fields, not code
    Clients fill in text, images, and links. That's the full scope of their access.
  • Live preview
    Desktop and mobile preview so clients can see exactly what they're sending.
  • One-click HTML export
    Clients export clean HTML and upload to their ESP independently.
  • AI Copy Assistant
    Helps clients write campaign copy in their brand voice. Fewer revision rounds.
Talk to the team Try the editor
Modular Mail editor showing client-facing content fields over a locked module library
Who it's for

Agency types that benefit most

Email production agencies

Agencies that build email templates as a core service. You deliver the design system once, then Modular Mail handles the client's day-to-day campaign production.

An email production agency delivers template systems to ten clients a year. Each client gets their own workspace and module library. Production work moves to the client; new module requests stay with the agency.

Lifecycle and CRM specialists

Agencies managing lifecycle and CRM programmes for clients need the design to stay locked while client teams handle the content. Modular Mail is built for exactly that split.

A CRM agency manages email programmes for multiple ecommerce clients. Templates are set up and owned by the agency. Clients build sends from the defined module library without pulling the agency back in.

Full-service digital agencies

Agencies delivering across channels: web, social, and email. Email is one service line. Modular Mail lets you deliver high-quality email systems without building a dedicated email team. Handing over a locked template system turns one-off builds into a retainer-friendly service.

A full-service agency adds Modular Mail to their retainer offering. Clients self-serve weekly campaign production. The agency stays involved for new template work, not for content updates.

Shopify and ecommerce agencies

Agencies building Shopify stores often inherit the email programme too. Modular Mail gives you a clean way to deliver a professional email system alongside the store build.

A Shopify agency includes an email template system in every store launch. The client gets a Modular Mail workspace with their brand's module library. Email production is self-service from day one.

FAQ

Modular Mail for agencies, in detail

  1. Is Modular Mail white-labelled?
    Workspace branding is not a feature today. Each client gets their own workspace and module library, and the interface shows Modular Mail branding. If branded workspaces are important for your engagement model, let us know. We're open to adding it and agency feedback shapes the roadmap.
  2. Can I manage multiple clients from one account?
    Yes. Agencies typically set up a separate workspace for each client. Each workspace is independent: its own module library, its own brand tokens, its own campaign history. You can manage all of them.
  3. How does billing work for agencies?
    Get in touch to discuss agency-specific pricing. We work with agencies running anywhere from two to twenty-plus client workspaces and can structure pricing accordingly.
  4. Who owns the template library during an engagement?
    Your agency owns the workspace and the template library. You can add the client as a user with appropriate permissions to build campaigns. If the engagement ends, ownership and access transitions can be handled case by case, and exported HTML stays usable regardless of subscription status.
  5. What if the client wants to leave and take their templates?
    Templates are built on standard HTML with mm-editable attributes. The underlying HTML is yours. If a client moves on, the HTML can be exported and used elsewhere. No lock-in.
  6. Do clients need training?
    Minimal. The editor is designed to be intuitive: pick a module, fill in a field, preview, export. Most clients are productive in a single session. We can provide onboarding documentation for your client handoff process.
  7. Can we use our own developer to set up templates?
    Yes. Your developer adds mm-editable tags to any HTML template to define the editable areas. If you prefer us to handle the build, we offer Figma to HTML conversion as a service.
Let's talk

Build a client handoff model that holds.

Tell us about your agency's email workflow. We'll show you how the template system would work for your clients.

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