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dwdl.de

Checked 2026-10-21 22:15 UTC · first added 2026-10-21
✗Problems found Score 65 of 100

Domain & DNS

warn

27 passed 1 warn 0 failed

Areas

iRegistration ✓Delegation iNameservers ✓SOA !DNSSEC iRecords

Problems

  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 21 iterations and a 24-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Recent checks

!

Full report

Domain & DNS report for dwdl.de ›

Mail

fail

18 passed 4 warn 2 failed

Areas

✗SPF ✗DMARC !DKIM ✓DNSSEC !MX !TLS iBIMI

Problems

  • ✗
    No 'all' mechanism
    SPF · SPF record doesn't have an 'all' mechanism. Add -all or ~all at the end of your SPF record.
    #3
  • ✗
    No DMARC record
    DMARC · No DMARC record was found for this domain. DMARC is essential for preventing email spoofing. Add a DMARC record with p=reject or at least p=quarantine.
    #5
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: poststelle.dwdl.de
    #11
  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: default (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Not configured
    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.
    #32

Recent checks

✗

Full report

Mail report for dwdl.de ›