Mail domain report: vivaldi.com

SPF

pass

SPF record published

Found

Record: v=spf1 ip4:31.209.137.20 ip4:31.209.137.31 -all
DNS lookups: 0 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 0 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

pass

p=reject (_dmarc.vivaldi.com)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc-reports@vivaldi.com; ruf=mailto:dmarc-forensics@vivaldi.com
Found at: _dmarc.vivaldi.com

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:dmarc-reports@vivaldi.com	Aggregate report addresses
ruf	mailto:dmarc-forensics@vivaldi.com	Failure report addresses

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:dmarc-reports@vivaldi.com
✓ Subdomain policy: reject #20

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

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: dkim, mail

Found

Selectors: dkim, mail
_domainkey: NOERROR

Selector	Key	Flags
dkim	RSA 2048 bits	h=sha256
mail	RSA 1024 bits	test mode (t=y)

Checks

✓ Keys found: dkim, mail #7

DKIM keys found for this domain with selectors: dkim, mail
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits). Rotate to a 2048-bit key.

#23
!

Key in test mode

These keys have t=y, so receivers treat DKIM failures as a test: mail. Remove t=y once DKIM works.

#24

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 34505, 2371
Signatures valid until: 29 November 2026, 14:21 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 2026-11-29 #21

DNSKEY signatures are valid until 2026-11-29T14:21:42Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	mail.vivaldi.com	A 31.209.137.20	mail.vivaldi.com ✓

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: mail.vivaldi.com

#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 1 MX address have a PTR record that resolves back to them.

TLS

pass

MTA-STS enforce · TLS-RPT · DANE on 1 of 1 MX hosts

Found

MTA-STS record: v=STSv1; id=2020020500;
Policy URL: https://mta-sts.vivaldi.com/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: mail.vivaldi.com
Max age: 604800 seconds
TLS-RPT record: v=TLSRPTv1;rua=mailto:tlsrpt@vivaldi.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
mail.vivaldi.com	3 1 1 b44a93900b5a0a40…	Yes

Checks

✓ Record published #32

MTA-STS record found with id 2020020500.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 168h0m0s.
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:tlsrpt@vivaldi.com
✓ DANE on all MX hosts #36

All 1 MX host 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