{"status":"ok","database":"up","redis":"up"}
TO: alice@example.com | FROM: sender1@example.com
  SUBJECT: Invoice [UNKNOWN:InvoiceNumber] — payment due 2026-09-24
  HTML: <h2>Invoice [UNKNOWN:InvoiceNumber]</h2><p>Dear Alice, your invoice of $1,270.76 is due 2026-09-24.</p>
  VARS: {'invoice_number': 'INV-KNKW-OAOYE-82J4MR-9303', 'amount': 1270.76, 'shipping': 43.72, 'phone': '+1 (555) 010-1234'}

TO: bob@example.com | FROM: sender1@example.com
  SUBJECT: Invoice [UNKNOWN:InvoiceNumber] — payment due 2026-09-24
  HTML: <h2>Invoice [UNKNOWN:InvoiceNumber]</h2><p>Dear Bob, your invoice of $349.13 is due 2026-09-24.</p>
  VARS: {'invoice_number': 'INV-MGZS-CT8EK-ZCCZQB-0966', 'amount': 349.13, 'shipping': 39.49, 'phone': '+1 (555) 010-1234'}

warnings? ['', '']