positive_min_ttl

Since: Version 2025.03.19-1d3f1f67

The functionality described in this section requires version 2025.03.19-1d3f1f67 of KumoMTA, or a more recent version.

Duration string. Lower bound for positive-response TTLs. Responses with a TTL below this value are cached as if their TTL were positive_min_ttl. Useful for clamping aggressive zero-TTL upstreams. Unset by default.