Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
stb.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 09:36:27 UTC · ↺ Refresh
MX Hostnames
- stb-com-br.mail.protection.outlook.com
MX Priorities
- stb-com-br.mail.protection.outlook.com: 1
A / AAAA Records
- 52.85.31.30 ↩ server-52-85-31-30.jfk50.r.cloudfront.net
- 52.85.31.56 ↩ server-52-85-31-56.jfk50.r.cloudfront.net
- 52.85.31.46
- 52.85.31.55
- 2600:9000:2026:bc00:6:b01f:2300:93a1
- 2600:9000:2026:7e00:6:b01f:2300:93a1
- 2600:9000:2026:5000:6:b01f:2300:93a1
- 2600:9000:2026:a200:6:b01f:2300:93a1
- 2600:9000:2026:3c00:6:b01f:2300:93a1
- 2600:9000:2026:e000:6:b01f:2300:93a1
- 2600:9000:2026:ee00:6:b01f:2300:93a1
- 2600:9000:2026:b200:6:b01f:2300:93a1
Mail Server IPs
- 52.101.9.20 ↩ mail-bl0pr02cu00604.inbound.protection.outlook.com
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
- 2a01:111:f403:c902::6 ↩ mail-sj0pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1696.awsdns-20.co.uk awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1696.awsdns-20.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-910.awsdns-49.net
ns-1117.awsdns-11.org
ns-1696.awsdns-20.co.uk
ns-224.awsdns-28.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.skymail.net.br include:spf.protection.outlook.com include:_spf.rdstation.com.br ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144.0/20 ip4:198.21.0.0/21 ip4:192.254.112.0/20 ip4:168.245.0.0/17 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; rf=afrf; pct=100
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- SPFv=spf1 include:spf.skymail.net.br include:spf.protection.outlook.com include:_spf.rdstation.com.br ip4:167.89.0.0/17 ip4:208.117.48.0/20 ip4:50.31.32.0/19 ip4:198.37.144.0/20 ip4:198.21.0.0/21 ip4:192.254.112.0/20 ip4:168.245.0.0/17 -all
- MS=ms23160187
- MS=ms57522250
- MS=ms71009137
- dvt7bfnsn2nws.cloudfront.net
- google-site-verification=vQhqjeYz5UQdm-FplCUMi_SG6WxVntJwWz5cIsd3i4I
Full email verification for stb.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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