phpunit.de

Checked 21 October 2026, 23:50 UTC · via 8.8.8.8
!Passed with warnings
23 passed 5 warnings 0 failed 1 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:mailbox.org ~all
DNS lookups
2 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 2 of 10 DNS lookups #2
    SPF record needs 2 DNS lookups (limit is 10).
  • ✓ Ends with ~all #3
    SPF record properly uses ~all to restrict unauthorized senders.
  • ✓ Record published #6
    SPF record exists for this domain.
  • ✓ Single record #16
    Exactly one SPF record is published.
  • ✓ Valid syntax #25
    All SPF mechanisms and modifiers are valid.
  • ✓ No void lookups #26
    All include/redirect targets exist.
  • ✓ No overly broad IP ranges #27
    All ip4/ip6 ranges are narrow enough.

DMARC

warn

p=reject (_dmarc.phpunit.de)

Found

Record
v=DMARC1; p=reject; radkim=s; aspf=s; ua=mailto:34b88b6f949742d6bbdd888e98aac25b@dmarc-reports.cloudflare.net
Found at
_dmarc.phpunit.de
TagValueMeaning
vDMARC1Version
prejectPolicy
aspfsSPF alignment (r = relaxed, s = strict)
radkims
uamailto:34b88b6f949742d6bbdd888e98aac25b@dmarc-reports.cloudflare.net

Checks

  • ✓ Policy: reject #4
    DMARC policy is set to 'reject', which provides the strongest protection against email spoofing.
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Applies to 100% of mail #18
    DMARC policy applies to all failing mail.
  • !
    No aggregate reports (rua)
    DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...
    #19
  • ✓ Subdomain policy: reject #20
    Subdomains are covered by policy 'reject'.

DKIM

warn

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NOERROR

Checks

  • !
    No key under common selectors
    The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.
    #7

DNSSEC

warn

Not signed

Found

DNSKEY records
No (0)
DS at parent
No

Checks

  • !
    Not enabled
    DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8

MX

pass

4 mail servers

Found

PriorityHostRecordsReverse DNS
10mxext1.mailbox.orgA 80.241.60.212 AAAA 2001:67c:2050:104:0:1:25:1mx1.mailbox.org ✓ mx1.mailbox.org ✓
10mxext2.mailbox.orgA 80.241.60.215 AAAA 2001:67c:2050:104:0:2:25:1mx2.mailbox.org ✓ mx2.mailbox.org ✓
10mxext3.mailbox.orgA 80.241.60.216 AAAA 2001:67c:2050:104:0:3:25:1mx3.mailbox.org ✓ mx3.mailbox.org ✓
10mxext4.mailbox.orgA 80.241.60.217 AAAA 2001:67c:2050:104:0:4:25:1mx4.mailbox.org ✓ mx4.mailbox.org ✓

Checks

  • ✓ 4 MX records #9
    Found 4 MX records for this domain.
  • ✓ All hosts resolve #10
    All MX records resolve to valid IP addresses.
  • ✓ All hosts have IPv6 #11
    All MX records resolve to IPv6 addresses.
  • ✓ Redundant MX hosts #12
    Found 4 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 4 MX records, which is within the recommended range (1-5).
  • ✓ No localhost targets #14
    No MX records pointing to localhost found.
  • ✓ No private IP addresses #15
    No MX records resolving to private IP addresses found.
  • ✓ No CNAME targets #22
    No MX records point to a CNAME.
  • ✓ Reverse DNS confirmed #30
    All 8 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 4 of 4 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mxext1.mailbox.org3 1 1 e41cc7633029afdb… 3 1 1 4758af6f02dfb5dc… 3 1 1 996ad31d65e03f03…Yes
mxext2.mailbox.org3 1 1 e41cc7633029afdb… 3 1 1 996ad31d65e03f03… 3 1 1 4758af6f02dfb5dc…Yes
mxext3.mailbox.org3 1 1 996ad31d65e03f03… 3 1 1 4758af6f02dfb5dc… 3 1 1 e41cc7633029afdb…Yes
mxext4.mailbox.org3 1 1 e41cc7633029afdb… 3 1 1 4758af6f02dfb5dc… 3 1 1 996ad31d65e03f03…Yes

Checks

  • !
    Not configured
    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
  • !
    Not configured
    MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".
    #35
  • ✓ DANE on all MX hosts #36
    All 4 MX hosts publish DNSSEC-validated TLSA records.

BIMI

info

No BIMI record

Checks

  • i
    Not configured
    BIMI shows your logo next to your mail in supporting mail clients. It requires DMARC enforcement.
    #38