Mail domain report: century21.fr

SPF

pass

SPF record published

Found

Record: v=spf1 a mx include:spf.mailjet.com include:protection.outlook.com ip4:194.146.226.0/24 ip4:199.187.172.0/22 ip4:199.244.72.0/22 ip4:185.228.36.0/22 ip4:217.13.48.163/32 ip4:217.25.181.98/32 ip4:217.25.181.99/32 ip4:217.25.181.100/32 ip4:85.204.25.5/24 ip4:185.127.4.73/24 ip4:185.127.4.0/22 ip4:81.93.8.128/28 ip4:81.93.9.128/28 ip4:81.93.10.128/28 ip4:81.93.11.128/28 ip4:81.93.0.0/23 ip4:217.74.104.0/26 ip6:2a02:6e8:0:6::/64 ip4:81.93.13.0 ip4:81.93.13.255 ip4:81.93.9.0 ip4:81.93.9.255 ip4:194.133.14.0/28 ip4:37.97.69.0 ip4:37.97.69.255 ip4:80.74.64.0/24 ip4:87.238.144.71 ip4:87.238.144.102 ip4:194.187.193.118 ip4:217.25.185.62 ip4:217.25.185.63 ip4:217.25.185.64 ip4:217.25.185.65 ip4:217.25.181.45 ip4:217.25.185.66 ip4:217.25.185.67 ip4:217.25.185.68 ip4:217.25.178.0/24 ip4:217.25.180.16/28 ip6:2001:1650:0:1600::/64 ip4:51.158.81.0/27 ip6:2001:bc8:3956:100::/64 ip4:137.74.65.224/28 ip6:2001:41d0:a:6eaa::/64 ip4:178.32.244.176/28 ip6:2001:41d0:1008:4c6::/64 ip4:178.32.244.177 ip4:137.74.65.225 ip4:51.158.81.3 ip6:2001:bc8:3956:100:101:4:0:1 ip4:195.101.53.0/24 ip4:217.25.181.242 ip4:85.233.223.142 ip4:85.233.223.134 ip4:85.233.223.133 ip4:85.233.223.135 ip4:194.187.192.0/22 ip4:92.174.224.225 ip4:80.74.76.19/24 ip4:64.73.120.224/27 ip4:213.41.42.80/28 ip4:149.11.40.42 ip4:195.68.23.38 ip4:195.68.23.32/28 ip4:40.66.49.44 ip4:4.233.216.68 ip4:20.199.50.194 ip4:20.199.50.140 ip4:20.199.24.53 ip4:4.233.216.203 ip4:40.66.33.185 ip4:40.66.34.9 ip4:20.39.233.47 ip4:40.66.36.120 ip4:40.66.36.200 ip4:20.199.26.213 ip4:20.199.27.85 ip4:20.199.28.55 ip4:20.199.28.23 ip4:20.199.28.67 ip4:20.199.28.46 -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.century21.fr)

Found

Record: v=DMARC1; p=none; rua=mailto:dmarc@century21.fr,mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com; fo=1
Found at: _dmarc.century21.fr
External report address: mailto:dmarc_rua@emaildefense.proofpoint.com (authorized)
External report address: mailto:dmarc_ruf@emaildefense.proofpoint.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:dmarc@century21.fr,mailto:dmarc_rua@emaildefense.proofpoint.com	Aggregate report addresses
ruf	mailto:dmarc_ruf@emaildefense.proofpoint.com	Failure report addresses
fo	1	Failure reporting options

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@century21.fr, mailto:dmarc_rua@emaildefense.proofpoint.com
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: mail, selector1, s1, s2

Found

Selectors: mail, selector1, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
mail	RSA 1024 bits
selector1	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: mail, selector1, s1, s2 #7

DKIM keys found for this domain with selectors: mail, selector1, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), selector1 (1024 bits), s2 (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

3 mail servers

Found

Priority	Host	Records	Reverse DNS
0	century21-fr.mail.protection.outlook.com	A 52.101.91.156 A 52.101.103.36 A 52.101.73.153 A 52.101.73.155 AAAA 2a01:111:f403:ca04::d AAAA 2a01:111:f403:ca38::a AAAA 2a01:111:f403:ca48::8 AAAA 2a01:111:f403:ca48::c	mail-maspr04cu00104.inbound.protection.outlook.com ✓ mail-miypr05cu00104.inbound.protection.outlook.com ✓ mail-as8pr05cu00401.inbound.protection.outlook.com ✓ mail-am7pr02cu00203.inbound.protection.outlook.com ✓ mail-db6pr03cu00105.inbound.protection.outlook.com ✓ mail-wa4pr05cu00102.inbound.protection.outlook.com ✓ mail-miypr02cu00100.inbound.protection.outlook.com ✓ mail-miypr03cu00104.inbound.protection.outlook.com ✓
10	century21-fr.mail.eo.outlook.com	A 52.101.68.27 A 52.101.91.156 A 52.101.68.21 A 52.101.181.156 AAAA 2a01:111:f403:ca04::e AAAA 2a01:111:f403:ca38::a AAAA 2a01:111:f403:ca04::10 AAAA 2a01:111:f403:ca09::22	mail-db7pr03cu00503.inbound.protection.outlook.com ✓ mail-maspr04cu00104.inbound.protection.outlook.com ✓ mail-db4pr02cu00205.inbound.protection.outlook.com ✓ mail-wa4pr05cu00104.inbound.protection.outlook.com ✓ mail-db8pr02cu00106.inbound.protection.outlook.com ✓ mail-wa4pr05cu00102.inbound.protection.outlook.com ✓ mail-dbapr03cu00100.inbound.protection.outlook.com ✓ mail-am7pr02cu00302.inbound.protection.outlook.com ✓
97	c21prod1-cms01.ikoula.biz	A 178.170.60.101	C21Prod1-CMS01.ikoula.biz ✓

Checks

✓ 3 MX records #9

Found 3 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: c21prod1-cms01.ikoula.biz

#11
✓ Redundant MX hosts #12

Found 3 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 3 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 17 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 3 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
century21-fr.mail.protection.outlook.com	none	-
century21-fr.mail.eo.outlook.com	none	-
c21prod1-cms01.ikoula.biz	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