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Personas can attach files to outbound emails and messages. Attachments are passed as base64-encoded content or as a signed URL from your connected storage provider.

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Example

{
  "to": "client@example.com",
  "subject": "Your contract is ready",
  "attachments": [
    {
      "filename": "contract.pdf",
      "content": "<base64-encoded-content>",
      "type": "application/pdf"
    }
  ]
}
Maximum attachment size is 25MB per message. For larger files, use a signed URL instead.