Anhänge

Bucket: email-attachments (privat)
Pfad:   {account_id}/{email_id}/{filename}

{
  "to": "kunde@example.com",
  "subject": "Ihr Angebot",
  "text_body": "Anbei das Angebot.",
  "attachments": [
    {
      "filename": "Angebot-2026.pdf",
      "content": "JVBERi0xLjQK...",
      "content_type": "application/pdf"
    }
  ]
}