Mail domain report: oad.nl

SPF

fail

SPF record published

Found

Record: v=spf1 a mx include:spf.protection.outlook.com include:_spf.oad.nl ~all
DNS lookups: 17 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✗

17 DNS lookups, over the limit of 10

SPF record needs 17 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record.

#2
✓ 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.oad.nl)

Found

Record: v=DMARC1; p=quarantine; rua=mailto:administrator@oad.nl; ruf=mailto:administrator@oad.nl;
Found at: _dmarc.oad.nl

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
rua	mailto:administrator@oad.nl	Aggregate report addresses
ruf	mailto:administrator@oad.nl	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:administrator@oad.nl
✓ 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: dkim, selector1, selector2, s1, s2

Found

Selectors: dkim, selector1, selector2, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
dkim	RSA 1024 bits	h=sha256
selector1	RSA 1024 bits
selector2	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

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

DKIM keys found for this domain with selectors: dkim, selector1, selector2, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits), selector1 (1024 bits), selector2 (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

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 146
Signatures valid until: 5 November 2026, 00:00 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 2026-11-05 #21

DNSKEY signatures are valid until 2026-11-05T00:00:00Z.

MX

warn

2 mail servers

Found

Priority	Host	Records	Reverse DNS
0	oad-nl.mail.protection.outlook.com	A 52.101.91.153 A 52.101.103.162 A 52.101.68.10 A 52.101.73.155 AAAA 2a01:111:f403:ca38::8 AAAA 2a01:111:f403:ca48::8 AAAA 2a01:111:f403:ca48::12 AAAA 2a01:111:f403:ca04::10	mail-matpr04cu00101.inbound.protection.outlook.com ✓ mail-miypr03cu00202.inbound.protection.outlook.com ✓ mail-dbbpr03cu00102.inbound.protection.outlook.com ✓ mail-am7pr02cu00203.inbound.protection.outlook.com ✓ mail-wa4pr04cu00100.inbound.protection.outlook.com ✓ mail-miypr02cu00100.inbound.protection.outlook.com ✓ mail-miypr05cu00202.inbound.protection.outlook.com ✓ mail-dbapr03cu00100.inbound.protection.outlook.com ✓
500	mx.sendgrid.net	A 3.136.245.72 A 3.17.120.38 A 52.25.213.239 A 16.52.61.209 A 52.37.49.26 A 13.216.54.185 A 44.216.124.122 A 16.52.110.174 A 34.198.67.24 A 18.224.101.244 A 15.222.160.229 A 44.245.249.202	ec2-3-136-245-72.us-east-2.compute.amazonaws.com ✓ ec2-3-17-120-38.us-east-2.compute.amazonaws.com ✓ ec2-52-25-213-239.us-west-2.compute.amazonaws.com ✓ ec2-16-52-61-209.ca-central-1.compute.amazonaws.com ✓ ec2-52-37-49-26.us-west-2.compute.amazonaws.com ✓ ec2-13-216-54-185.compute-1.amazonaws.com ✓ ec2-44-216-124-122.compute-1.amazonaws.com ✓ ec2-16-52-110-174.ca-central-1.compute.amazonaws.com ✓ ec2-34-198-67-24.compute-1.amazonaws.com ✓ ec2-18-224-101-244.us-east-2.compute.amazonaws.com ✓ ec2-15-222-160-229.ca-central-1.compute.amazonaws.com ✓ ec2-44-245-249-202.us-west-2.compute.amazonaws.com ✓

Checks

✓ 2 MX records #9

Found 2 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: mx.sendgrid.net

#11
✓ Redundant MX hosts #12

Found 2 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 2 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 20 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
oad-nl.mail.protection.outlook.com	none	-
mx.sendgrid.net	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