Mail domain report: ensma.fr

SPF

pass

SPF record published

Found

Record: v=spf1 mx a:smtp1.ensma.fr a:smtp2.ensma.fr a:smtp3.ensma.fr include:spf.relay.renater.fr -all
DNS lookups: 5 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✓ 5 of 10 DNS lookups #2

SPF record needs 5 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

pass

p=reject (_dmarc.ensma.fr)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc@relay.renater.fr; ruf=mailto:forensics@ensma.fr; fo=1
Found at: _dmarc.ensma.fr
External report address: mailto:dmarc@relay.renater.fr (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:dmarc@relay.renater.fr	Aggregate report addresses
ruf	mailto:forensics@ensma.fr	Failure report addresses
fo	1	Failure reporting options

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.
✓ Aggregate reports enabled #19

Aggregate reports are sent to: mailto:dmarc@relay.renater.fr
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: mail

Found

Selectors: mail
_domainkey: NOERROR

Selector	Key	Flags
mail	RSA 1024 bits	h=sha256

Checks

✓ Keys found: mail #7

DKIM keys found for this domain with selectors: mail
!

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

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 1689
Signatures valid until: 3 November 2026, 14:45 UTC

Checks

✓ Signed, DS published at parent #8

DNSSEC is enabled for this domain (DNSKEY and DS present), providing additional security for DNS lookups.
✓ Signatures valid until 2026-11-03 #21

DNSKEY signatures are valid until 2026-11-03T14:45:34Z.

MX

warn

2 mail servers

Found

Priority	Host	Records	Reverse DNS
40	mx1.relay.renater.fr	A 85.31.212.3	mx1.relay.renater.fr ✓
40	mx2.relay.renater.fr	A 85.31.212.203	mx2.relay.renater.fr ✓

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.relay.renater.fr, mx2.relay.renater.fr

#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

fail

MTA-STS record without policy · TLS-RPT · DANE on 0 of 2 MX hosts

Found

MTA-STS record: v=STSv1; id=20261008154519
Policy URL: https://mta-sts.ensma.fr/.well-known/mta-sts.txt
Policy error: Get "https://mta-sts.ensma.fr/.well-known/mta-sts.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
TLS-RPT record: v=TLSRPTv1; rua=mailto:forensics@ensma.fr

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx1.relay.renater.fr	none	-
mx2.relay.renater.fr	none	-

Checks

✓ Record published #32

MTA-STS record found with id 20261008154519.
✗

Policy not reachable

The MTA-STS record exists but the policy could not be fetched, so senders ignore MTA-STS: Get "https://mta-sts.ensma.fr/.well-known/mta-sts.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers).

#33
✓ Reports enabled #35

TLS reports are sent to: mailto:forensics@ensma.fr
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