Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tb-engr.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-29 17:23:20 UTC · ↺ Refresh
MX Hostnames
- tbengr-com0e.mail.protection.outlook.com
MX Priorities
- tbengr-com0e.mail.protection.outlook.com: 10
A / AAAA Records
- 69.16.220.94 ↩ host03.bluesymphony.com
Mail Server IPs
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.41.21 ↩ mail-sj2pr05cu00305.inbound.protection.outlook.com
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f802:: ↩ mail-byapr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.nxio.net dns.nxio.net 2026032302 7200 1800 1209600 3600
Primary NS (mname)
ns1.nxio.net
Admin Email (rname)
dns@nxio.net
Serial
2026032302
Refresh
7200s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns2.nxio.net
ns4.nxio.net
ns1.nxio.net
ns3.nxio.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com ip4:23.116.92.145 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
2 records- MS=ms77663260
- SPFv=spf1 include:spf.protection.outlook.com ip4:23.116.92.145 -all
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