Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
b3.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-17 18:36:16 UTC · ↺ Refresh
MX Hostnames
- b3-com-br.mail.protection.outlook.com
MX Priorities
- b3-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 172.64.144.135 (no PTR)
- 104.18.43.121 (no PTR)
Mail Server IPs
- 52.101.50.1 ↩ mail-co1pr05cu00401.inbound.protection.outlook.com
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
deb.ns.cloudflare.com dns.cloudflare.com 2398937307 10000 2400 604800 1800
Primary NS (mname)
deb.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398937307
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
deb.ns.cloudflare.com
jose.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:b3cspf.b3.com.br include:bvmf.com.br include:sendgrid.net ip4:177.66.124.167 ip4:189.112.203.82 ip4:200.19.56.243 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; fo=1; ri=3600;rua=mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- _globalsign-domain-verification=l6WWklM0g2gcyhtRuzE-6_pOg6bnLyoKrMqqe73JMJ
- cisco-ci-domain-verification=5865d93a5bbbd26703b57b0b4ae6afbf7e7041d493d767f46ebc737405acc084
- jamf-site-verification=pAB8xnI50_1qaiCWLmsb9w
- SPFv=spf1 include:b3cspf.b3.com.br include:bvmf.com.br include:sendgrid.net ip4:177.66.124.167 ip4:189.112.203.82 ip4:200.19.56.243 -all
- windsurf-verification=Rj0pNXjdxQEXKTebs2yH5O4UimUrJWr3zaHLZZG8J54=
- Ip9Iy57Wp5SN+JcON5/LZNHnGhMaTuuFJf91NIT4n+llXT8PlkumNdwC0jr5LLsrUMDA8zkg5WxVOkIP9OFj7A==
- MS=ms96295294
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