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protonmail.com

Checked 2026-10-22 10:22 UTC · first added 2026-10-21
!Passed with warnings Score 85 of 100

Domain & DNS

warn

31 passed 1 warn 0 failed

Areas

iRegistration !Delegation iNameservers ✓SOA ✓DNSSEC ✓Records

Problems

  • !
    No IPv6
    Delegation · None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Recent checks

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Full report

Domain & DNS report for protonmail.com ›

Mail

warn

27 passed 4 warn 0 failed

Areas

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

Problems

  • !
    Policy: quarantine
    DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #4
  • !
    No key under common selectors
    DKIM · The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.
    #7
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mail.protonmail.ch, mailsec.protonmail.ch
    #11
  • !
    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

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Full report

Mail report for protonmail.com ›