Mail domain report: bigregister.nl

SPF

info

SPF record published

Found

Record: v=spf1 redirect=spf-a.ssonet.nl
DNS lookups: 6 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 6 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to spf-a.ssonet.nl, whose policy applies.

#3
✓ 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

pass

p=reject (_dmarc.bigregister.nl)

Found

Record: v=DMARC1; p=reject; adkim=r; aspf=r; pct=100; fo=1; rf=afrf; ri=86400; ruf=mailto:dmarcFailureRep@ag.ssonet.nl!10m; rua=mailto:DMARCaggrep@ag.ssonet.nl!2m
Found at: _dmarc.bigregister.nl
External report address: mailto:DMARCaggrep@ag.ssonet.nl!2m (authorized)
External report address: mailto:dmarcFailureRep@ag.ssonet.nl!10m (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:DMARCaggrep@ag.ssonet.nl!2m	Aggregate report addresses
ruf	mailto:dmarcFailureRep@ag.ssonet.nl!10m	Failure report addresses
adkim	r	DKIM alignment (r = relaxed, s = strict)
aspf	r	SPF alignment (r = relaxed, s = strict)
fo	1	Failure reporting options
rf	afrf	Failure report format
ri	86400	Report interval (seconds)

Checks

✓ Policy: reject #4

DMARC policy is set to 'reject', which provides the strongest protection against email spoofing.
✓ 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:DMARCaggrep@ag.ssonet.nl!2m
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

pass

Selectors: selector1, selector2

Found

Selectors: selector1, selector2
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits
selector2	RSA 2048 bits

Checks

✓ Keys found: selector1, selector2 #7

DKIM keys found for this domain with selectors: selector1, selector2
✓ Strong keys #23

DKIM keys are strong enough: selector1: RSA 2048 bits; selector2: RSA 2048 bits.
✓ 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: 21158
Signatures valid until: 29 October 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 2026-10-29 #21

DNSKEY signatures are valid until 2026-10-29T00:00:00Z.

MX

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mail.ssonet.nl	A 144.43.249.200 AAAA 2a04:9a03:1011:1001::4	mail.ssonet.nl ✓ mail.ssonet.nl ✓
10	mail2.ssonet.nl	A 147.181.98.131 AAAA 2a04:9a03:1012:1001::1	mail2.ssonet.nl ✓ mail2.ssonet.nl ✓

Checks

✓ 2 MX records #9

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

TLS

warn

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

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mail.ssonet.nl	2 1 1 957b778a9e65927b… 3 1 1 d04ef4b5e007eb74…	Yes
mail2.ssonet.nl	3 1 1 d04ef4b5e007eb74… 2 1 1 957b778a9e65927b…	Yes

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
!

Not configured

MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".

#35
✓ DANE on all MX hosts #36

All 2 MX hosts publish DNSSEC-validated TLSA records.

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