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CaptainDNS

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.

HTTP Uptime Monitor

Monitor your sites with scheduled HTTP checks and email alerts.

Status Pages

Publish a public status page grouping your HTTP monitors.

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.

🇧🇷 Email Security in Brazil

Weekly audit of email security across 76 listed companies headquartered in Brazil.

76 companies analysed · Scan week: 2026-03-23

  • Listed companies headquartered in Brazil score an average of 45/100 for email authentication and DNS security.
  • 0% of Brazil companies achieve grades A+ or A in email security, while 59% score D or F.
  • This is 3 points above the global average of 42 across all 1601 companies in the observatory.
  • DMARC email authentication is deployed by 88.2% of Brazil companies, with 36.8% enforcing a reject policy to prevent domain spoofing.
  • SPF records are published on 97% of analysed domains, authorizing legitimate email senders.
  • BIMI brand indicator adoption stands at 1% in Brazil.
  • MTA-STS enforced TLS encryption is deployed by 0% of companies, securing inbound email delivery.
  • DNSSEC domain signing is active on 22.4% of Brazil domains.
  • The highest-scoring company is ENGIE Brasil with 71/100 (B).
  • Hypera Pharma trails at 0/100, with significant room for improvement.
  • Scores range from 0 to 71 with a median of 45, showing disparate email security postures across Brazil listed companies.

Average score

45/ 100

DMARC reject

36.8%

BIMI configured

1%

MTA-STS enforce

0%

DNSSEC enabled

22.4%

0
A+
0
A
4
B
27
C
36
D
9
F

45

Average

45

Median

0

Min

71

Max

Grade
1ENGIE Brasilengie.com.br71B
2Fleuryfleury.com.br70B
3Embraerembraer.com70B
4SLC Agrícolaslcagricola.com.br70B
5EcoRodoviasecorodovias.com.br67C
6B3b3.com.br67C
7Banco do Brasilbb.com.br65+1C
8Petrobraspetrobras.com.br63C
9JBSjbs.com.br62C
10RaiaDrogasilraiadrogasil.com.br62C
11EDP - Energias do Brasiledp.com.br61-2C
123R Petroleum3rpetroleum.com.br60C
13Santander Brasilsantander.com.br58C
14Minerva Foodsminervafoods.com57+2C
15Equatorial Energiaequatorialenergia.com.br56C
16Cognacogna.com.br55+11C
17Klabinklabin.com.br55C
18BRFbrf-global.com55C
19Cosancosan.com.br54C
20Banco Interinter.co54C
21BB Seguridadebbseguridade.com.br53C
22Energisaenergisa.com.br52C
23Gol Linhas Aéreasvoegol.com.br52C
24Itaúsaitausa.com.br52C
25Localizalocaliza.com52C
26CSNcsn.com.br51C
27CEMIGcemig.com.br51+2C
28Magazine Luizamagazineluiza.com.br51C
29WEGweg.net51C
30CPFL Energiacpfl.com.br51-13C
31Banco Panbancopan.com.br50C
32Taesataesa.com.br49D
33Alpargatasalpargatas.com.br49D
34Natura &Conaturaeco.com49D
35BTG Pactualbtgpactual.com47D
36Hapvidahapvida.com.br46D
37Locaweblocaweb.com.br46D
38Assaíassai.com.br46D
39Multiplanmultiplan.com.br45D
40Vibra Energiavibra.com.br44D
41Itaú Unibancoitau.com.br44D
42Copelcopel.com43D
43MRV Engenhariamrv.com.br43D
44Lojas Rennerrenner.com.br43D
45Bradesparbradespar.com.br41D
46Ambevambev.com.br41D
47Bradescobradesco.com.br41D
48TOTVStotvs.com.br41D
49Telefónica Brasiltelefonica.com.br41D
50Sabespsabesp.com.br40+2D
51Cielocielo.com.br40D
52Ezteceztec.com.br39D
53Valevale.com38D
54Eletrobraseletrobras.com38D
55Gerdaugerdau.com37D
56Metalúrgica Gerdaugerdau.com37D
57Dexcodexco.com.br37D
58Grupo Somagruposoma.com.br36D
59Iguatemiiguatemi.com.br36D
60Rede D'Orrededorsaoluiz.com.br36D
61Suzanosuzano.com.br36D
62Enevaeneva.com.br35D
63Braskembraskem.com34D
64Carrefour Brasilcarrefour.com.br33D
65Marfrigmarfrig.com.br32D
66Yduqsyduqs.com.br31D
67CCRccr.com.br30D
68Usiminasusiminas.com.br29F
69Ultraparultrapar.com.br29F
70IRB Brasil REirbbrasil.com.br29F
71Azul Airlinesazul.com.br26F
72Rumorumo.com.br26F
73Prioprio.com.br23F
74Cyrela Brazil Realtycyrela.com.br23-9F
75TIM Brasiltim.com.br23F
76Hypera Pharmahyperafarmaceutica.com.br0F

Understanding country-level analysis

Grouping companies by country reveals how corporate email security practices vary across markets. Countries with stricter regulatory environments or more mature cybersecurity ecosystems tend to show higher average scores.

What this page shows:

  • Average score - The mean email security score across all listed companies in this country
  • Grade distribution - How many companies fall into each grade bracket (A+ through F)
  • DMARC reject rate - The percentage of companies enforcing strict DMARC policies
  • Company table - Individual scores, grades and key indicator status

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 grouped by country?

A: Based on the stock exchange where they are listed.

Q: What standards are checked?

A: SPF, DKIM, DMARC, BIMI, MTA-STS, DANE/TLSA and DNSSEC.

Q: Can I compare countries?

A: Yes, via the Statistics page.

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