Mail domain report: radissonhotels.com

SPF

pass

SPF record published

Found

Record: v=spf1 mx a ip4:52.208.166.252 ip4:93.165.150.78/32 ip4:207.166.86.53 ip4:207.166.92.11 ip4:207.166.94.53 ip4:207.166.95.11 ip4:128.177.144.7 include:spf.protection.outlook.com include:spf.rezidor.com include:spf.tmes.trendmicro.com ip4:155.56.208.100 ip4:18.198.35.158 ip4:3.65.86.245 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.0.0/16 ip4:208.185.229.0/24 ip4:208.185.235.0/24 ip4:62.190.159.144/28 ip4:62.190.59.144/28 ip4:128.177.154.7 ip4:65.221.28.5 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ip4:216.71.96.0/22 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:52.254.72.70 ip4:216.119.209.33 ip4:216.119.217.33 ip4:199.91.136.28 ip4:149.96.5.209 ip4:149.96.5.7 ip4:149.96.6.7 ip4:149.96.6.3 ip4:149.96.6.2 ip4:149.96.5.2 ip4:149.96.6.209 ip4:149.96.5.3 ip4:149.96.5.6 ip4:199.91.140.28 ip4:149.96.6.6 ip4:149.96.14.2 ip4:148.139.0.2 ip4:199.91.141.22 ip4:199.91.141.145 ip4:199.91.141.23 ip4:199.91.140.26 ip4:148.139.2.2 ip4:148.139.3.2 ip4:199.91.139.24 ip4:199.91.140.28 ip4:148.139.1.2 ip4:199.91.136.28 ip4:37.98.234.2 ip4:148.139.0.31 ip4:199.91.137.2 ip4:37.98.232.12 ip4:199.91.139.22 ip4:37.98.232.26 ip4:199.91.136.26 ip4:199.91.137.26 ip4:199.91.139.145 ip4:199.91.141.24 ip4:148.139.1.31 ip4:149.96.13.2 ip4:37.98.232.2 ip4:199.91.139.23 ip4:37.98.235.2 ip4:149.96.2.26 ip4:149.96.195.2 ip4:149.96.1.26 ip4:148.139.104.16 ip4:149.96.133.2 ip4:149.96.221.2 ip4:148.139.105.17 ip4:103.23.67.26 ip4:103.23.65.2 ip4:149.96.220.2 ip4:199.91.136.28 ip4:148.139.105.16 ip4:103.23.64.2 ip4:148.139.104.17 ip4:103.23.66.26 ip4:149.96.194.2 ip4:199.91.140.28 ip4:149.96.132.2 ip4:167.89.77.138 ip4:40.113.134.102 ip4:3.210.182.90 ip4:155.56.208.101 ip4:155.56.208.100/30 ip4:167.89.115.56 ip4:167.89.115.83 ip4:167.89.115.52 ip4:167.89.115.120 ip4:50.31.156.96/27 ip4:104.245.209.192/26 ip4:50.31.205.0/24 -all
DNS lookups: 8 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✓ 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

warn

p=quarantine (_dmarc.radissonhotels.com)

Found

Record: v=DMARC1; p=quarantine; rua=mailto:protecting.rhg@radissonhotels.com; ruf=mailto:protecting.rhg@radissonhotels.com
Found at: _dmarc.radissonhotels.com

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
rua	mailto:protecting.rhg@radissonhotels.com	Aggregate report addresses
ruf	mailto:protecting.rhg@radissonhotels.com	Failure report addresses

Checks

!

Policy: quarantine

DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

#4
✓ 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:protecting.rhg@radissonhotels.com
✓ Subdomain policy: quarantine #20

Subdomains are covered by policy 'quarantine'.
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: k1, selector1, s1, s2

Found

Selectors: k1, selector1, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
k1	RSA 1024 bits
selector1	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: k1, selector1, s1, s2 #7

DKIM keys found for this domain with selectors: k1, selector1, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: k1 (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

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	radissonhotels.in.tmes.trendmicro.eu	A 18.185.115.145 A 18.185.115.146 A 18.185.115.147	in.tmes.trendmicro.eu ✓ in.tmes.trendmicro.eu ✓ in.tmes.trendmicro.eu ✓

Checks

✓ 1 MX record #9

Found 1 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: radissonhotels.in.tmes.trendmicro.eu

#11
!

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 3 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
radissonhotels.in.tmes.trendmicro.eu	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