Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
firstreserve.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 22:10:35 UTC · ↺ Refresh
MX Hostnames
- firstreserve-com.mail.protection.outlook.com
MX Priorities
- firstreserve-com.mail.protection.outlook.com: 0
A / AAAA Records
- 20.121.254.205 (no PTR)
Mail Server IPs
- 52.101.194.15 ↩ mail-ch4pr21cu00107.inbound.protection.outlook.com
- 52.101.8.34 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:c801:: ↩ mail-sa9pr02cu00200.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c931::1 ↩ mail-sa9pr03cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-09.azure-dns.com gwestgate.firstreserve.com 2017020302 3600 600 604800 60
Primary NS (mname)
ns1-09.azure-dns.com
Admin Email (rname)
gwestgate@firstreserve.com
Serial
2017020302
Refresh
3600s
Retry
600s
Expire
604800s
Minimum TTL
60s
Nameservers (NS)
ns4-09.azure-dns.info
ns1-09.azure-dns.com
ns2-09.azure-dns.net
ns3-09.azure-dns.org
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 2/10
✓ 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: 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- SPFv=spf1 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com -all
- adobe-idp-site-verification=ffdcb09d-6120-4178-acde-0ac6a66594e9
- adobe-sign-verification=2c2d64c631bc34e865715239ea126707
Full email verification for firstreserve.com
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