challenges.fr

Checked 22 October 2026, 02:12 UTC · via 8.8.8.8
✗Problems found
21 passed 5 warnings 1 failed 3 info

SPF

warn

SPF record published

Found

Record
v=spf1 mx ptr:rev.nouvelobs.com include:spf.mandrillapp.com include:amazonses.com ip4:78.153.234.233 a:mx.biwing.fr ip4:213.41.17.153 include:spf.protection.outlook.com include:spf.sendinblue.com include:spf.voxpay.fr -all
DNS lookups
8 of 10
Void lookups
0 of 2

Checks

  • !
    Uses deprecated ptr mechanism
    The ptr mechanism in SPF records is deprecated due to performance issues and should be avoided.
    #1
  • ✓ 8 of 10 DNS lookups #2
    SPF record needs 8 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

fail

p=none (_dmarc.challenges.fr)

Found

Record
v=DMARC1; p=none; sp=none; rua=mailto:dmarc@mailinblue.com!10m,mailto:dmarc_agg@vali.email; ruf=mailto:dmarc@mailinblue.com!10m; rf=afrf; pct=100; ri=86400
Found at
_dmarc.challenges.fr
External report address
mailto:dmarc@mailinblue.com!10m (authorized)
External report address
mailto:dmarc_agg@vali.email (authorized)
TagValueMeaning
vDMARC1Version
pnonePolicy
spnoneSubdomain policy
pct100Percentage of mail the policy applies to
ruamailto:dmarc@mailinblue.com!10m,mailto:dmarc_agg@vali.emailAggregate report addresses
rufmailto:dmarc@mailinblue.com!10mFailure report addresses
rfafrfFailure report format
ri86400Report interval (seconds)

Checks

  • ✗
    Policy: none (monitoring only)
    DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:dmarc@mailinblue.com!10m, mailto:dmarc_agg@vali.email
  • ✓ External report addresses authorized #29
    Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: mail, selector1, s1

Found

Selectors
mail, selector1, s1
_domainkey
NXDOMAIN
SelectorKeyFlags
mailRSA 1024 bits
selector1RSA 2048 bits
s1RSA 2048 bits

Checks

  • ✓ Keys found: mail, selector1, s1 #7
    DKIM keys found for this domain with selectors: mail, selector1, s1
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits). Rotate to a 2048-bit key.
    #23
  • ✓ No problematic flags #24
    No keys in test mode, revoked, or limited to SHA-1.

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

warn

2 mail servers

Found

PriorityHostRecordsReverse DNS
10mx1.sfagroup.comA 62.23.180.153mx1.sfagroup.com ✓
20mx2.sfagroup.comA 62.23.24.44mx2.sfagroup.com ✓

Checks

  • ✓ 2 MX records #9
    Found 2 MX records for this domain.
  • ✓ All hosts resolve #10
    All MX records resolve to valid IP addresses.
  • !
    Hosts without IPv6
    The following MX hosts could not be resolved to IPv6 addresses: mx1.sfagroup.com, mx2.sfagroup.com
    #11
  • ✓ Redundant MX hosts #12
    Found 2 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 2 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 2 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mx1.sfagroup.comnone-
mx2.sfagroup.comnone-

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
  • i
    Not configured
    TLS-RPT lets senders report TLS delivery problems to you. It is most useful together with MTA-STS or DANE.
    #35
  • i
    Not used
    No MX host publishes TLSA records. DANE lets senders verify your mail server's certificate through DNSSEC; it requires DNSSEC on the MX host's zone.
    #36

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