SurfaceMap › t › threema.com

threema.com

Checked 2026-10-22 11:04 UTC · first added 2026-10-21
✗Problems found Score 81 of 100

Domain & DNS

warn

31 passed 1 warn 0 failed

Areas

iRegistration iDelegation iNameservers ✓SOA !DNSSEC ✓Records

Problems

  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 0 iterations and a 8-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 threema.com ›

Mail

fail

16 passed 2 warn 1 failed

Areas

✓SPF !DMARC ✗DKIM ✓DNSSEC !MX iBIMI

Problems

  • ✗
    No DKIM keys published
    DKIM · _domainkey.threema.com does not exist (NXDOMAIN), so no DKIM keys are published. DKIM helps prevent email spoofing. Configure DKIM with your email service provider.
    #7
  • !
    No MX records
    MX · No MX records found. If this domain is used for email, add MX records to specify mail servers. If it never receives mail, publish a null MX ("MX 0 .").
    #9
  • !
    No aggregate reports (rua)
    DMARC · DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...
    #19

Recent checks

✗

Full report

Mail report for threema.com ›