Tabellarium is a resilient Logback appender that ships structured log events to Apache Kafka. Named after the Roman letter-carrier, it never blocks the sender: per-topic-class circuit breakers stop hammering a broken route, mandatory overrides pin the strictest producer-side delivery settings for audit-class topics (acks=all, idempotence), and a fallback appender catches what cannot be shipped. Delivery is best-effort transport: events are handed off through bounded in-memory queues, so a crash, overflow, or expired shutdown budget can lose events - the appender is not, by itself, a durable audit trail.