Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nibco.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 05:23:25 UTC · ↺ Refresh
MX Hostnames
- nibco-com.mail.protection.outlook.com
MX Priorities
- nibco-com.mail.protection.outlook.com: 100
A / AAAA Records
- 217.114.94.2 (no PTR)
Mail Server IPs
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.11.3 ↩ mail-sn1pr0501cu00103.inbound.protection.outlook.com
- 52.101.11.9 ↩ mail-sn1pr02cu00101.inbound.protection.outlook.com
- 52.101.40.2 ↩ mail-cy1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c946::7 ↩ mail-ch5pr02cu00307.inbound.protection.outlook.com
- 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
xbru.br.ns.els-gms.att.net rm-hostmaster.ems.att.com 129 3600 10000 3600 3600
Primary NS (mname)
xbru.br.ns.els-gms.att.net
Admin Email (rname)
rm-hostmaster@ems.att.com
Serial
129
Refresh
3600s
Retry
10000s
Expire
3600s
Minimum TTL
3600s
Nameservers (NS)
dmtu.mt.ns.els-gms.att.net
dbru.br.ns.els-gms.att.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:18.219.20.126 ip4:3.131.189.167 ip4:3.22.154.151 ip4:3.129.189.236 ip4:3.134.15.30 ip4:3.129.145.172 include:_spf.psm.knowbe4.com include:sendgrid.net include:2217564.spf06.hubspotemail.net include:spf.protection.outlook.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1;p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 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
9 records- docusign=5bfc5897-c902-46e8-80cc-3a9bf4b8cd05
- google-site-verification=m7hnHLf9JscQryQRgn_5SmugJPXGERfiovmmAlzDDiM
- apple-domain-verification=eGVYqQiwyOvb6bCi
- knowbe4-site-verification=06a4e00d7e4ec46c0924c27c8e2e184c
- google-site-verification=S1OCLJ9M4w9J6LI-Y3yTMu6tIg2_B0-IEptk4nXUjZs
- canva-site-verification=Ba3r91HX1TTX_D7-6HhcNA
- SPFv=spf1 ip4:18.219.20.126 ip4:3.131.189.167 ip4:3.22.154.151 ip4:3.129.189.236 ip4:3.134.15.30 ip4:3.129.145.172 include:_spf.psm.knowbe4.com include:sendgrid.net include:2217564.spf06.hubspotemail.net include:spf.protection.outlook.com -all
- Nv1rbRXSiRj3mh5yxPeOCktOV5tcTT2PxO4VDiNEPeS1OFh6JgxJqpuA4taMS7ktE9uFw/vEoJQ/8ZwjvYgvyQ==
- docusign=0ae7b9bd-51f0-49b6-990e-76dc01d06b65
Full email verification for nibco.com
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