Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nationalhvacservice.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 11:17:01 UTC · ↺ Refresh
MX Hostnames
- nationalhvacservice-com.mail.protection.outlook.com
MX Priorities
- nationalhvacservice-com.mail.protection.outlook.com: 0
A / AAAA Records
- 45.79.207.234 ↩ 45-79-207-234.ip.linodeusercontent.com
Mail Server IPs
- 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
- 52.101.9.0 ↩ mail-bl2pr02cu00100.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 2a01:111:f403:c801::1 ↩ mail-sn1pr0501cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-08.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-08.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns1-08.azure-dns.com
ns2-08.azure-dns.net
ns3-08.azure-dns.org
ns4-08.azure-dns.info
SPF Record
✓ Soft Fail (~all)
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=quarantine; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=0:1:d:s
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: quarantine
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
7 records- _globalsign-domain-verification=IDjQ71pzsXtukm8uwoFBuaPAuj3UDdhXIGB5IA9Q_k
- ZOOM_verify_ESEejHiwSJqRtUNKwk2eTg
- MS=ms60107794
- box_verify_dh89hsj
- _globalsign-domain-verification=g-QUYiBudK-JeUPIki6Yicv1_LXfXLJFzptHs8iLlL
- SPFv=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
- apple-domain-verification=9LlqBTimxvyIhNjB
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