Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tbconstruct.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 08:29:20 UTC · ↺ Refresh
MX Hostnames
- tbconstruct-com.mail.protection.outlook.com
MX Priorities
- tbconstruct-com.mail.protection.outlook.com: 0
A / AAAA Records
- 3.209.74.134 ↩ ec2-3-209-74-134.compute-1.amazonaws.com
Mail Server IPs
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 52.101.9.20 ↩ mail-bl0pr02cu00604.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c922::2 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
- 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
SOA Record
Raw SOA
ns13.worldnic.com namehost.worldnic.com 123051214 10800 3600 604800 3600
Primary NS (mname)
ns13.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
123051214
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns13.worldnic.com
ns14.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
3 records- qjurgdb14ft26cdn52d1u6bin0
- SPFv=spf1 include:spf.protection.outlook.com -all
- MS=ms92965853
Full email verification for tbconstruct.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits