idelux.be

Delegation · The addresses at the parent (glue) differ from the addresses in the zone: nameserver2.win.be (glue 212.166.3.108, zone 212.166.3.108, 2a01:5a00:3000:10::20); ns.idelux.be (glue 94.104.16.185, zone 209.206.1.37). Update the glue at your registrar.

SOA · negative caching TTL (minimum) 2d is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1d, retry 2h, expire 1000h, negative TTL 2d.

SOA · The SOA RNAME "hostmaster" is not a valid mailbox (expected e.g. hostmaster.example.com).

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), selector1 (1024 bits). Rotate to a 2048-bit key.

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.