keurslager.nl

Records · These records have a TTL below 5m, causing extra queries and slower lookups: AAAA (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 5m; resolvers may use either.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits), mail (1024 bits), email (1024 bits). Rotate to a 2048-bit key.

DKIM · These keys have t=y, so receivers treat DKIM failures as a test: mail. Remove t=y once DKIM works.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.