Mail domain report: corum.fr

SPF

pass

SPF record published

Found

Record: v=spf1 include:customers.clickdimensions.com include:spf.protection.outlook.com include:spf.mandrillapp.com -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

fail

p=none (_dmarc.corum.fr)

Found

Record: v=DMARC1; p=none; rua=mailto:fab6b11e02ea4c8cbc906ed33553cf92@dmarc-reports.cloudflare.net;
Found at: _dmarc.corum.fr
External report address: mailto:fab6b11e02ea4c8cbc906ed33553cf92@dmarc-reports.cloudflare.net (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:fab6b11e02ea4c8cbc906ed33553cf92@dmarc-reports.cloudflare.net	Aggregate 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:fab6b11e02ea4c8cbc906ed33553cf92@dmarc-reports.cloudflare.net
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: selector1, selector2

Found

Selectors: selector1, selector2
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 1024 bits
selector2	RSA 2048 bits

Checks

✓ Keys found: selector1, selector2 #7

DKIM keys found for this domain with selectors: selector1, selector2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (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 (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 2371, 34505
Signatures valid until: 12 December 2026, 18:38 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 2026-12-12 #21

DNSKEY signatures are valid until 2026-12-12T18:38:08Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	corum-fr.mail.protection.outlook.com	A 52.101.185.114 A 52.101.91.159 A 52.101.68.15 A 52.101.68.39 AAAA 2a01:111:f403:ca3c::a AAAA 2a01:111:f403:ca48::e AAAA 2a01:111:f403:ca48::a AAAA 2a01:111:f403:ca38::a	mail-zrxpr04cu00102.inbound.protection.outlook.com ✓ mail-matpr04cu00207.inbound.protection.outlook.com ✓ mail-db6pr03cu00107.inbound.protection.outlook.com ✓ mail-db7pr03cu00607.inbound.protection.outlook.com ✓ mail-zrxpr07cu00102.inbound.protection.outlook.com ✓ mail-miypr03cu00206.inbound.protection.outlook.com ✓ mail-miypr02cu00202.inbound.protection.outlook.com ✓ mail-wa4pr05cu00102.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

info

MTA-STS enforce · TLS-RPT · DANE on 0 of 1 MX hosts

Found

MTA-STS record: v=STSv1; id=2022926134
Policy URL: https://mta-sts.corum.fr/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: *.mail.protection.outlook.com, *.mta1102.eu.messagegears.net
Max age: 120480 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:enterpriseadministrators@corum.fr

DANE (TLSA records)

MX host	TLSA	DNSSEC
corum-fr.mail.protection.outlook.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 2022926134.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 33h28m0s.
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:enterpriseadministrators@corum.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