Mail domain report: tinkercad.com

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf.protection.outlook.com include:sendgrid.net -all
DNS lookups: 3 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 3 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.tinkercad.com)

Found

Record: v=DMARC1; p=none;
Found at: _dmarc.tinkercad.com

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy

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.
!

No aggregate reports (rua)

DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...

#19

DKIM

fail

Selectors: selector1, selector2, pm, s1, s2

Found

Selectors: selector1, selector2, pm, s1, s2
_domainkey: NXDOMAIN

Selector	Key	Flags
selector1	RSA 2048 bits
selector2	RSA 2048 bits
pm	RSA 768 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: selector1, selector2, pm, s1, s2 #7

DKIM keys found for this domain with selectors: selector1, selector2, pm, s1, s2
✗

Weak DKIM key

RSA keys shorter than 1024 bits can be cracked and are ignored by receivers (RFC 8301): pm (768 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

5 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mx0a-000a5201.pphosted.com	(does not resolve)
10	mx0b-000a5201.pphosted.com	(does not resolve)
10	tinkercad-com.mail.protection.outlook.com	A 52.101.41.26 A 52.101.194.13 A 52.101.8.32 A 52.101.42.81 AAAA 2a01:111:f403:c927::1 AAAA 2a01:111:f403:f909::6 AAAA 2a01:111:f403:c922::6 AAAA 2a01:111:f403:c946::7	mail-sj0pr03cu01702.inbound.protection.outlook.com ✓ mail-ch0pr04cu00605.inbound.protection.outlook.com ✓ mail-dm8pr21cu00100.inbound.protection.outlook.com ✓ mail-ea2pr04cu00101.inbound.protection.outlook.com ✓ mail-bn8pr05cu00301.inbound.protection.outlook.com ✓ mail-bn3pr04cu00106.inbound.protection.outlook.com ✓ mail-bl2pr02cu00506.inbound.protection.outlook.com ✓ mail-ch5pr02cu00307.inbound.protection.outlook.com ✓
20	mxa-000a5201.gslb.pphosted.com	(does not resolve)
20	mxb-000a5201.gslb.pphosted.com	(does not resolve)

Checks

✓ 5 MX records #9

Found 5 MX records for this domain.
!

Hosts without IP addresses

The following MX hosts could not be resolved to IP addresses: mx0a-000a5201.pphosted.com, mx0b-000a5201.pphosted.com, mxa-000a5201.gslb.pphosted.com, mxb-000a5201.gslb.pphosted.com

#10
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: mx0a-000a5201.pphosted.com, mx0b-000a5201.pphosted.com, mxa-000a5201.gslb.pphosted.com, mxb-000a5201.gslb.pphosted.com

#11
✓ Redundant MX hosts #12

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

Found 5 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 5 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx0a-000a5201.pphosted.com	none	-
mx0b-000a5201.pphosted.com	none	-
tinkercad-com.mail.protection.outlook.com	none	-
mxa-000a5201.gslb.pphosted.com	none	-
mxb-000a5201.gslb.pphosted.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