Email Template Generator: Create Reusable Lifecycle and Transactional Templates
A template generator should create a repeatable module that a workflow can render safely. The output must survive missing names, changed prices, empty product lists, and customers who have already completed the action.
Template schema
| Field | Example |
|---|---|
| Purpose | Payment receipt |
| Trigger | Payment settled |
| Required variables | Amount, currency, receipt ID |
| Optional variables | Customer name, product image |
| Fallback | “Your payment was received” |
| Primary CTA | View receipt |
| Suppression | Refund, duplicate event |
| QA fixtures | Paid, missing name, refunded |
Generator prompt
Create a reusable template spec for the supplied event.
Return required and optional variables, fallback copy, CTA,
suppression rules, plain-text version, accessibility notes,
and five QA fixtures. Do not invent product facts.Output example
Purpose: receipt after settled payment. Required: receipt number, amount, currency, paid timestamp. Fallback: hide customer name and product image, never hide amount or receipt number. Exit: none for the receipt; refunds use a separate state. Metric: successful record delivery and reduced billing questions.
Modular content
Keep subject, preheader, header, fact summary, action, help, and footer as separate modules. A template may share a shell with other messages, but transactional facts should remain state-specific.
QA
Render every required field missing one at a time, test long names and currencies, check links and plain text, and compare the editor preview with the final email HTML. Human review is required for billing, security, legal, and regulated claims.
For event-driven output, see the transactional template generator.
Separate the content model from the renderer
The generator should describe what the message means before it chooses HTML:
| Layer | Responsibility |
|---|---|
| Event | What happened and when |
| Content model | Facts, states, variables, and approved copy |
| Policy | Consent, suppression, priority, and expiry |
| Renderer | Responsive HTML, plain text, accessibility, and fallbacks |
| Delivery | Queueing, retries, provider response, and audit |
This separation lets the same approved content render for a browser preview, a text-only fallback, and the final email without making the model responsible for delivery behavior.
Ask for state variants
For a payment receipt, request paid, partially refunded, fully refunded, and duplicate-event variants. For an order message, request paid, shipped, delayed, delivered, and canceled variants. The generator should identify which event owns each variant and what happens when two events arrive out of order.
Require a field contract for every variant:
- type and requiredness;
- source system and freshness;
- display formatting for currency, time, and locale;
- neutral fallback;
- suppression or replacement rule;
- fixture that proves it renders.
Never allow a missing required fact to turn into an empty sentence or visible template syntax.
Review and version templates
Keep template, content, event schema, and policy versions together in the send record. A later edit to the shared footer should not make it impossible to reconstruct what a customer received. Require a preview with long values, images blocked, dark mode, narrow mobile width, and a plain-text part before activation.
Measure rendering failures, missing-field suppression, successful delivery, support contacts, and the message’s intended outcome. A reusable template is valuable because it is predictable under change, not because it contains the most modules.