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Email Diagnostics

Tools to verify and validate your email authentication setup.

SPF
DKIM
DMARC
DMARCbis
BIMI
MTA-STS
TLS-RPT
DANE / TLSA

Deliverability

Email deliverability auditMail header analyzerEmail testerIP Blacklist CheckerDomain Blacklist CheckerSPF FlattenerDKIM Selector FinderSMTP/MX Tester

Secure & Monitor

Record generators, policy hosting and continuous monitoring.

Network & Web

Network tools, web page analysis and certificates.

IP Tools

My IP address

Detect your IPv4/IPv6 addresses and their geolocation.

Reverse lookup

Resolve a PTR record and validate DNS consistency.

IP WhoIs

Identify the owner of an IP range and its contacts.

IPv4 netmask

Calculate network, broadcast and usable hosts for any IPv4 block.

IPv6 subnet calculator

Calculate IPv6 subnets, address ranges and reverse DNS entries.

Certificates & BIMI

BIMI logo lookup

Inspect a BIMI logo URL - format, metadata and live rendering - before rollout.

BIMI SVG converter

Convert any SVG to BIMI-compliant Tiny-PS format in seconds.

CSR parser

Inspect a CSR, extract subject details, fingerprints and requested SANs.

VMC inspector

Inspect a Verified Mark Certificate - issuer, validity and SAN coverage - before you publish BIMI.

Web

Page size checker

Check if your page exceeds Google's 2 MB crawl limit.

Phishing URL Checker

Check if a URL is flagged as phishing or malware by 4 threat intelligence sources.

Redirect Checker

Analyze HTTP redirect chains

Domain Redirect

Redirect your domains with automatic HTTPS and 301/302 redirects.

Developer Tools

Text utilities and tools for everyday dev work.

Text

Transform and measure your content in seconds.

Text case converter

Convert any block of text to upper or lower case instantly.

Slug generator

Transform any sentence into an SEO-friendly slug in seconds.

Word & character counter

Measure the length of any text, with instant word and character counts.

Password generator

Generate strong random passwords and memorable passphrases instantly.

Developer

Encoding, hashing, regex and formatting for everyday dev work.

Base64 encoder / decoder

Encode or decode any content in Base64 without leaving the browser.

Hash Generator

Compute MD5, SHA-1, SHA-256 and SHA-512 hashes of any text.

URL encoder / decoder

Encode or decode text using percent-encoding (RFC 3986) right in your browser.

Regex Tester

Test a regular expression against text and visualize matches.

JSON / YAML Formatter

Format, validate and convert JSON and YAML in one click.

🇳🇱 AEX Email Security

Weekly audit of email security across 25 companies in the AEX.

Euronext Amsterdam · 25 companies analysed · Scan week: 2026-03-23

  • Companies listed in the AEX score an average of 56/100 for email security this week.
  • 0% of AEX companies achieve a grade of A+ or A in email authentication, while 28% receive a D or F.
  • The average score of 56 is 14 points above the global average of 42, indicating stronger-than-average email security practices.
  • 100% of AEX companies have deployed DMARC email authentication, and 76% enforce a strict reject policy to block spoofed emails.
  • SPF record deployment stands at 100%, authorizing legitimate sending servers and helping prevent email spoofing.
  • 20% of companies have configured BIMI to display their verified brand logo in supported email clients.
  • 0% enforce TLS encryption for inbound email delivery via MTA-STS, protecting against downgrade attacks.
  • DNSSEC is enabled on 36% of AEX domains, adding cryptographic validation to DNS queries.
  • ABN AMRO leads the AEX with a top score of 82/100 (B).
  • Wolters Kluwer has the lowest score at 36/100, indicating significant gaps in email security configuration.
  • Scores range from 36 to 82 with a median of 56, reflecting varied levels of email security maturity across the index.

Average score

56/ 100

DMARC reject

76%

BIMI configured

20%

MTA-STS enforce

0%

DNSSEC enabled

36%

0
A+
0
A
3
B
15
C
7
D
0
F

56

Average

56

Median

36

Min

82

Max

Company

Grade
1ABN AMROabnamro.com82B
2IMCDimcdgroup.com74B
3Shellshell.com72B
4ASR Nederlandasrnederland.nl68C
5ASMLasml.com67C
6NN Groupnn-group.com66C
7Heinekentheheinekencompany.com61+2C
8Just Eat Takeawayjusteattakeaway.com60C
9Adyenadyen.com59+2C
10Randstadrandstad.com59C
11Aegonaegon.com58C
12Airbusairbus.com58C
13Signifysignify.com56+2C
14WDPwdp.eu55C
15Exorexor.com55C
16Philipsphilips.com54C
17ING Grouping.com53C
18DSM-Firmenichdsm-firmenich.com52C
19Universal Music Groupuniversalmusic.com49D
20Akzo Nobelakzonobel.com49D
21NXP Semiconductorsnxp.com46D
22Prosusprosus.com43D
23Besibesi.com41D
24Ahold Delhaizeaholddelhaize.com38D
25Wolters Kluwerwolterskluwer.com36D

Understanding index-level analysis

A stock index groups the largest companies in a market. Analyzing their email security provides a representative snapshot of how a country's or region's corporate sector protects against email-based threats.

What this page shows:

  • Average score - The mean email security score across all constituent companies
  • Grade distribution - How many companies fall into each grade bracket (A+ through F)
  • Company table - Individual scores, grades and key indicator status for each company
  • Sector breakdown - How different industries within the index compare

Key standards tracked

Each company is evaluated on:

  1. SPF - Is the sending policy properly configured? Does it use -all (hard fail)?
  2. DKIM - Are signing keys published and strong enough (2048-bit minimum)?
  3. DMARC - Is a policy in place? Is it set to quarantine or reject?
  4. BIMI - Is the brand logo published for inbox display?
  5. MTA-STS - Is inbound email transport encryption enforced?
  6. DNSSEC - Is the DNS zone signed to prevent spoofing?

FAQ - Frequently asked questions

Q: How are companies scored?

A: Each domain is analyzed for email authentication standards and awarded up to 100 points across three pillars.

Q: What does the grade distribution show?

A: The spread of scores from A+ to F, indicating overall index maturity.

Q: Can I compare indices?

A: Yes, via the Statistics page.

PagePurpose
Observatory DashboardOverall overview with key metrics
StatisticsCross-index and cross-sector comparison
Email Domain CheckAudit your own domain