Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
btx.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 20:00:11 UTC · ↺ Refresh
MX Hostnames
- btx-com-br.mail.protection.outlook.com
MX Priorities
- btx-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 198.49.23.145 (no PTR)
- 198.185.159.145 (no PTR)
- 198.49.23.144
- 198.185.159.144
Mail Server IPs
- 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 52.101.41.22 ↩ mail-sj2pr05cu00406.inbound.protection.outlook.com
- 2a01:111:f403:f908::1 ↩ mail-bn1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.infokeep.com.br system.hradm.com 2026032306 3600 1800 1209600 86400
Primary NS (mname)
ns1.infokeep.com.br
Admin Email (rname)
system@hradm.com
Serial
2026032306
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns1.infokeep.com.br
ns2.infokeep.com.br
SPF Record
✓ Strict (-all)
v=spf1 include:relay.mailchannels.net +a +mx +ip4:45.164.92.27 +ip4:45.164.93.26 +include:relay.mailchannels.net +include:_spf.onedns.com.br +ip4:189.113.174.237 +include:_spf.onedns.com.br +ip4:198.37.157.85 +include:spf.protection.outlook.com -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
default._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:relay.mailchannels.net +a +mx +ip4:45.164.92.27 +ip4:45.164.93.26 +include:relay.mailchannels.net +include:_spf.onedns.com.br +ip4:189.113.174.237 +include:_spf.onedns.com.br +ip4:198.37.157.85 +include:spf.protection.outlook.com -all
Full email verification for btx.com.br
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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