Templates

Create reusable email templates with dynamic variables. Templates store your email subject, HTML, and text content so you can send personalized emails without rebuilding content on every request.

Create a TemplateCopy Anchor Link

POST https://api.mail.land/v1/templates

curl -X POST https://api.mail.land/v1/templates \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..." \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Order Confirmation",
    "subject": "Your order #{{orderNumber}} is confirmed",
    "htmlContent": "<h1>Thanks, {{firstName}}!</h1><p>Order #{{orderNumber}} has been confirmed. Total: {{total}}</p>",
    "textContent": "Thanks, {{firstName}}! Order #{{orderNumber}} has been confirmed. Total: {{total}}",
    "categoryId": "k3v9q2m7xw4tpa"
  }'

{
  "id": "t8x2m4q9zk7wpr",
  "name": "Order Confirmation",
  "subject": "Your order #{{orderNumber}} is confirmed",
  "htmlContent": "<h1>Thanks, {{firstName}}!</h1>...",
  "textContent": "Thanks, {{firstName}}!...",
  "categoryId": "k3v9q2m7xw4tpa",
  "categoryName": "Transactional",
  "categoryColor": "#3B82F6",
  "createdAt": "2026-02-17T10:00:00Z",
  "updatedAt": null
}

Validation RulesCopy Anchor Link

Variable SyntaxCopy Anchor Link

Use double curly braces for variable substitution:

<h1>Hello {{firstName}},</h1>
<p>Your order #{{orderNumber}} shipped on {{shipDate}}.</p>
<p>Track your package: <a href="{{trackingUrl}}">{{trackingNumber}}</a></p>

Variables are replaced at send time. Pass values via the variables field in your send request:

{
  "from": { "email": "[email protected]" },
  "to": [
    {
      "email": "[email protected]",
      "variables": {
        "firstName": "Jane",
        "orderNumber": "ORD-12345",
        "shipDate": "Feb 17, 2026",
        "trackingUrl": "https://track.example.com/ABC123",
        "trackingNumber": "ABC123"
      }
    }
  ],
  "templateId": "t8x2m4q9zk7wpr"
}

Default ValuesCopy Anchor Link

A template can carry a default value for each contact field it uses, so a subscriber who has no value for that field still receives the email. Set them with variableDefaults, an object of placeholder name to value, on create and update. It is returned when you get, list or duplicate a template.

{
  "name": "Welcome",
  "subject": "Hello {{firstName}}",
  "htmlContent": "<p>Hi {{firstName}}</p>",
  "variableDefaults": { "firstName": "there" }
}

Rules:

• Defaults apply to campaign and automation sends only. A recipient's own non-blank value always wins over the default.
• A field with neither a value nor a default is still refused: MailLand never sends a literal {{firstName}}.
• Transactional API and SMTP sends are not affected. There, the values come from your request, and a missing one is refused as described above.
• On update, leaving variableDefaults out keeps the stored defaults. Send {} to clear them.
• Names follow the placeholder syntax. email and subscriberId are always supplied and cannot have a default. A value is one line of at most 200 characters, and a template holds at most 50 defaults.

In the dashboard editor, each placeholder has a default input that shows how many subscribers are missing that field, and saving warns you if a field with missing subscribers has no default.

Preview a TemplateCopy Anchor Link

Preview a template with sample values auto-filled for detected variables:

GET https://api.mail.land/v1/templates/{id}/preview

curl https://api.mail.land/v1/templates/t8x2m4q9zk7wpr/preview \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

{
  "id": "t8x2m4q9zk7wpr",
  "name": "Order Confirmation",
  "subject": "Your order #12345 is confirmed",
  "renderedHtml": "<h1>Thanks, John!</h1><p>Order #12345 has been confirmed.</p>",
  "renderedText": "Thanks, John! Order #12345 has been confirmed."
}

Duplicate a TemplateCopy Anchor Link

Clone an existing template:

POST https://api.mail.land/v1/templates/{id}/duplicate

curl -X POST https://api.mail.land/v1/templates/t8x2m4q9zk7wpr/duplicate \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

The duplicate receives an auto-generated name: "Order Confirmation (Copy)". If a copy already exists, the name increments: "Order Confirmation (Copy 2)", etc.

Template CategoriesCopy Anchor Link

Organize templates into categories with optional colors.

Create a categoryCopy Anchor Link

POST https://api.mail.land/v1/templates/categories

curl -X POST https://api.mail.land/v1/templates/categories \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..." \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Transactional",
    "description": "Order confirmations, receipts, and shipping notifications",
    "color": "#3B82F6"
  }'

List categoriesCopy Anchor Link

GET https://api.mail.land/v1/templates/categories

curl https://api.mail.land/v1/templates/categories \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

{
  "categories": [
    {
      "id": "k3v9q2m7xw4tpa",
      "name": "Transactional",
      "description": "Order confirmations, receipts",
      "color": "#3B82F6",
      "templateCount": 12,
      "createdAt": "2026-01-15T10:00:00Z"
    }
  ],
  "totalCount": 3
}

List TemplatesCopy Anchor Link

GET https://api.mail.land/v1/templates?limit=50

curl "https://api.mail.land/v1/templates?limit=50" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

Filter by category:

GET https://api.mail.land/v1/templates?categoryId=k3v9q2m7xw4tpa

curl "https://api.mail.land/v1/templates?categoryId=k3v9q2m7xw4tpa" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

{
  "items": [
    {
      "id": "t8x2m4q9zk7wpr",
      "name": "Order Confirmation",
      "subject": "Your order #{{orderNumber}} is confirmed",
      "htmlContent": "...",
      "categoryName": "Transactional",
      "categoryColor": "#3B82F6",
      "createdAt": "2026-02-17T10:00:00Z"
    }
  ],
  "nextCursor": "eyJ2IjoxLCJzIjoiY3JlYXRlZGF0OmRlc2MiLCJrIjoi...",
  "hasMore": true
}

Update a TemplateCopy Anchor Link

PUT https://api.mail.land/v1/templates/{id}

All fields are required in the update request (this is a full replacement, not a partial update):

curl -X PUT https://api.mail.land/v1/templates/t8x2m4q9zk7wpr \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..." \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Order Confirmation v2",
    "subject": "Order #{{orderNumber}} confirmed - {{companyName}}",
    "htmlContent": "<h1>Thanks, {{firstName}}!</h1><p>Updated template content.</p>",
    "textContent": "Thanks, {{firstName}}! Updated template content.",
    "categoryId": "k3v9q2m7xw4tpa"
  }'

Delete a TemplateCopy Anchor Link

DELETE https://api.mail.land/v1/templates/{id}

curl -X DELETE https://api.mail.land/v1/templates/t8x2m4q9zk7wpr \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..."

Returns 204 No Content on success. A deleted template can no longer be retrieved, listed, or used to send: a send request referencing it, immediate or scheduled, is refused with 400 TEMPLATE_NOT_FOUND, and a schedule whose template is deleted before its due time is refused the same way at send time.

Using Templates When SendingCopy Anchor Link

Reference a template by ID in your send request. The template's subject and content are used, with variables substituted:

{
  "from": { "email": "[email protected]" },
  "to": [
    {
      "email": "[email protected]",
      "variables": {
        "firstName": "Jane",
        "orderNumber": "ORD-12345"
      }
    }
  ],
  "templateId": "t8x2m4q9zk7wpr",
  "variables": {
    "companyName": "Acme Inc"
  }
}

When templateId is set, the template's rendered subject is always used; a subject in the send request is ignored.

Plan LimitsCopy Anchor Link

The number of templates you can create depends on your plan. If you reach the limit, creating a new template returns 403 PLAN_LIMIT_REACHED.

Next StepsCopy Anchor Link

• REST API: send emails with templates
• Batch Sending: use templates with batch emails
• Scheduled Emails: use templates via /v1/transactional/send with scheduledAt (the scheduled-emails endpoint has no templateId)