Mail domain report: universite-lyon.fr

SPF

info

SPF record published

Found

Record: v=spf1 redirect=_spf.%{d}
DNS lookups: 1 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 1 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to _spf.%{d}, whose policy applies.

#3
✓ 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.universite-lyon.fr)

Found

Record: v=DMARC1; p=none; rua=mailto:dmarc@universite-lyon.fr,mailto:dmarc_agg@vali.email; ruf=mailto:dmarc@universite-lyon.fr;
Found at: _dmarc.universite-lyon.fr
External report address: mailto:dmarc_agg@vali.email (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:dmarc@universite-lyon.fr,mailto:dmarc_agg@vali.email	Aggregate report addresses
ruf	mailto:dmarc@universite-lyon.fr	Failure report addresses

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@universite-lyon.fr, mailto:dmarc_agg@vali.email
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

pass

Selectors: selector1

Found

Selectors: selector1
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits

Checks

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
✓ Strong keys #23

DKIM keys are strong enough: selector1: RSA 2048 bits.
✓ No problematic flags #24

No keys in test mode, revoked, or limited to SHA-1.

DNSSEC

warn

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 35718, 37419
Signatures valid until: 28 October 2026, 21:29 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 expire in 160h0m0s

DNSKEY signatures expire at 2026-10-28T21:29:13Z (in 160h0m0s). Check that re-signing works.

#21

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	universitelyon-fr02e.mail.protection.outlook.com	A 52.101.209.28 A 52.101.103.39 A 52.101.91.162 A 52.101.68.25 AAAA 2a01:111:f403:ca25:: AAAA 2a01:111:f403:ca25::2 AAAA 2a01:111:f403:ca25::1 AAAA 2a01:111:f403:ca1e::	mail-cpjpr05cu00104.inbound.protection.outlook.com ✓ mail-miypr05cu00207.inbound.protection.outlook.com ✓ mail-matpr04cu00302.inbound.protection.outlook.com ✓ mail-db8pr02cu00101.inbound.protection.outlook.com ✓ mail-pa5p264cu00200.inbound.protection.outlook.com ✓ mail-paup264cu00202.inbound.protection.outlook.com ✓ mail-pr0p264cu01301.inbound.protection.outlook.com ✓ mail-mrzp264cu00100.inbound.protection.outlook.com ✓

Checks

✓ 1 MX record #9

Found 1 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.
!

Single MX host, no backup

Only one MX record found. For better email reliability, consider adding at least one backup MX server.

#12
✓ At most 5 MX records #13

Found 1 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 0 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
universitelyon-fr02e.mail.protection.outlook.com	none	-

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