Writing the mail and SMS a document is sent with

• A mail belongs to a document type and a language. When a document is mailed, Linet takes the template of its type in its print language. The PDF is always attached.
• An SMS belongs to what it is sent for, its entity_type_id: 10 a document (with entity_id the document type), 11 a document's payment request, or 80 a service call (chosen per service status).

A placeholder is {{group.field}}, or {{group.field|filter}} to format it: {{totals.total|money}}, {{document.due_date|date}}, {{recipient.name|upper}}, {{document.reference|default:"your order"}}. The syntax and the filters are exactly the print templates': see Print templates › Fields in text.

• Escaped: in a mail body every value is inserted as text, never as HTML, so a customer name cannot break the mail. Two placeholders are HTML on purpose: {{lines.table}} and {{company.logo}}.
• Links: a mail also fills placeholders inside a link's href: <a href="{{links.pay}}">Pay</a>. A links.* value goes in as it is, anything else is URL-encoded there.
• Unknown: a placeholder or filter that does not exist prints nothing, and the API refuses to save it (422, naming it).
• The old ones still work: templates written with %docnum%, %company%, %totalPrint% and the like print as before, and may be mixed with the new ones. The tables below show the new name for each old one.

An SMS template for invoices, and what it sent for an invoice on a test company:

Invoice {{document.number}} from {{company.name}}: {{totals.total|money}}, due {{document.due_date|date}}. Pay: {{links.pay_short}}

Invoice 326810 from טסטינג: ₪ 100.00, due 29/10/2026. Pay: https://…

A mail template (subject, then body):

{{document.type_name}} {{document.number}} from {{company.name}}

<p>Hello {{recipient.name}},</p>
<p>Attached is {{document.type_name}} {{document.number}} of {{document.issue_date|date}}
   for <b>{{totals.total|money}}</b>.</p>
<p><a href="{{links.pay}}">Pay online</a></p>

חשבונית מס 326810 from טסטינג

Hello Test cred,
Attached is חשבונית מס 326810 of 29/10/2026 for ₪ 100.00.
Pay online (https://…)

The document type's name is in the document's print language, here Hebrew.

The same list as GET /message-placeholders (placeholders.json).

Sent for a documenta service call as a mailan SMS

A body is sanitised when it is saved and again when it is sent, for what mail clients show:

• Inline style="" only: <style>, <head> and <script> are dropped.
• Tables, bgcolor, width, align, dir and max-width survive. Use <span dir="ltr"> around numbers, phones and addresses in a right-to-left body.
• No data: images: an image needs a public https address ({{company.logo}} is one).
• border-radius and box-shadow survive; Outlook desktop ignores both.

Scopes settings:read and settings:write, as for print templates. A preview never makes a PDF: links show as a placeholder address. The full reference: API v2 › Message templates.