DNS & Email Security Report for dmarcian.com

• A record presentcritical

  2 A record(s) found

• AAAA record presentrecommended

  No AAAA records

• MX records presentrecommended

  4 MX record(s) found

• NS records presentcritical

  4 NS record(s) found

• SOA record presentcritical

  SOA record found

• Multiple nameserversrecommended

  4 nameservers configured ✓

• SOA serial formatinfo

  Serial 12 (valid, managed DNS format)

• SOA timers validinfo

  Refresh: 21600s ✓, Retry: 3600s ✓, Expire: 259200s ✗. Expire should be 604800-2419200s (1-4 weeks)

• No lame nameserversinfo

  4 NS all responding ✓

• Glue records presentinfo

  No glue needed

• WWW record configuredinfo

  CNAME: 1jc8z3g48onw.wpeproxy.com

• MX servers have PTR recordsinfo

  0/8 MX IPs have PTR. Configure reverse DNS for your mail servers

• MX servers have FCrDNSinfo

  0/8 MX IPs have FCrDNS. PTR hostnames must resolve back to the original IP.

• DNSSEC signedrecommended

  DNSSEC is enabled ✓

• DNSSEC validation OKcritical

  DNSSEC validates correctly ✓

• NSEC3 RFC 9276 compliantrecommended

  NSEC3 not RFC 9276 compliant: iterations=1 (must be 0), salt="1e88270bb0072e63" (must be empty). Modern resolvers may reject this zone

• RRSIG signatures validrecommended

  RRSIG signatures valid, earliest expiry in 20 days ✓

• Modern DNSSEC algorithmoptional

  RSA/SHA-256 (algorithm 8) — acceptable ✓

• DS digest algorithm modernrecommended

  DS digest: SHA-256 — modern ✓

• DNSKEY algorithm secureoptional

  DNSKEY: RSA/SHA-256 — acceptable, consider ECDSA (13) or Ed25519 (15)

• RRSIG TTL saferecommended

  Record TTLs do not exceed RRSIG validity periods ✓

• Chain of trust completecritical

  Complete chain: DNSKEY + DS + RRSIG ✓

• Website reachable via IPv6recommended

  No IPv6 for website. Add AAAA record pointing to your IPv6 address

• Mail servers reachable via IPv6recommended

  4/4 MX server(s) with IPv6 ✓

• Nameservers reachable via IPv6recommended

  4/4 NS server(s) with IPv6 ✓

• SPF record presentcritical

  v=spf1 include:_spf.google.com -all

• SPF syntax validcritical

  SPF syntax is correct ✓

• SPF policy strict (-all)recommended

  SPF uses -all (hard fail) ✓

• DKIM foundrecommended

  DKIM selector: k1 ✓

• DMARC record presentrecommended

  v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];

• DMARC policy quarantine or betterrecommended

  DMARC policy: reject ✓

• DMARC policy rejectoptional

  DMARC policy: reject ✓

• BIMI record presentoptional

  BIMI logo: https://dmarcian.com/wp-content/themes/_dmarcian/img/bimi/dm_bimi.svg

• BIMI configuration validoptional

  BIMI correctly configured ✓

• MTA-STS record presentoptional

  MTA-STS configured ✓

• MTA-STS policy enforcedoptional

  MTA-STS mode: testing. Set mode: enforce for full protection

• MX records validcritical

  4 MX record(s) ✓

• MX domains use DNSSECrecommended

  1/1 MX domain(s) use DNSSEC ✓

• MX DNSSEC validation OKrecommended

  MX DNSSEC validates correctly ✓

• Mail servers not blacklistedcritical

  1 MX server(s) checked against 16 blacklists - clean ✓

• No critical blacklist listingscritical

  No blacklist listings ✓

• CAA records presentrecommended

  No CAA records. Add CAA record to specify allowed certificate authorities

• CAA policy strictoptional

  CAA not strict. Add CAA 0 issue "letsencrypt.org" (or your CA) to restrict issuance

• TLSA records (DANE)optional

  No TLSA/DANE records. Add TLSA at _25._tcp.mail for DANE email encryption

• DANE configuration validoptional

  No DANE configured

• No sensitive info in TXTcritical

  No sensitive data leaked ✓

• Verification records reviewedinfo

  4 verification record(s): Google, Have I Been Pwned, Apple, Microsoft 365. Consider if all are still needed

• HTTPS availablecritical

  HTTPS working (status 200) ✓

• Valid certificatecritical

  Certificate chain is valid and trusted ✓

• HTTP redirects to HTTPScritical

  HTTP automatically redirects to HTTPS ✓

• HSTS enabledrecommended

  No HSTS header. Add Strict-Transport-Security header with max-age of at least 31536000 (1 year)

• HSTS max-age >= 1 yearoptional

  HSTS not enabled

• X-Frame-Options headerrecommended

  X-Frame-Options: DENY ✓

• X-Content-Type-Options headerrecommended

  X-Content-Type-Options: nosniff ✓

• Content-Security-Policy headerrecommended

  Content-Security-Policy configured ✓

• Referrer-Policy headerrecommended

  Referrer-Policy: no-referrer-when-downgrade ✓

• security.txt presentoptional

  security.txt found

• security.txt validoptional

  security.txt missing required fields. Must have Contact: and Expires: per RFC 9116

• HTTP/3 (QUIC) supportedoptional

  HTTP/3 (QUIC v1) on port 443 Detection methods: QUIC probe: QUIC v1 (RFC 9000) (8ms) Alt-Svc header: h3=":443" Cache: 24h (ma=86400)

• QUIC UDP reachableoptional

  QUIC reachable on UDP/443 (8ms) — QUIC v1 (RFC 9000) ✓

• HTTPS DNS record (SVCB)optional

  No HTTPS DNS record (type 65). Add HTTPS record for faster HTTP/3 discovery: dmarcian.com IN HTTPS 1 . alpn="h3,h2"

Configure reverse DNS for mail servers

Ask the owner of each mail server IP address to set a PTR record, for example 203.0.113.10 -> mail.yourdomain.com.

Impact: Improves mail-server trust signals and reduces deliverability risk

Add IPv6 support

Request AAAA records from your hosting provider for your website. IPv6 is becoming increasingly important.

Impact: Makes your website accessible to IPv6-only networks

Add CAA records

Define which Certificate Authorities may issue SSL certificates, for example: "0 issue letsencrypt.org"

Impact: Prevents unauthorized certificate issuance