Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
threehammer.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 12:01:16 UTC · ↺ Refresh
MX Hostnames
- threehammer-com.mail.protection.outlook.com
MX Priorities
- threehammer-com.mail.protection.outlook.com: 0
A / AAAA Records
- 173.236.255.155 ↩ apache2-kant.iad1-shared-b8-36.dreamhost.com
Mail Server IPs
- 52.101.41.58 ↩ mail-sj0pr02cu00102.inbound.protection.outlook.com
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 2a01:111:f403:f802::1 ↩ mail-sj2pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 2a01:111:f403:c931:: ↩ mail-sn1pr02cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.dreamhost.com hostmaster.dreamhost.com 2026031703 16474 600 1814400 60
Primary NS (mname)
ns1.dreamhost.com
Admin Email (rname)
hostmaster@dreamhost.com
Serial
2026031703
Refresh
16474s
Retry
600s
Expire
1814400s
Minimum TTL
60s
Nameservers (NS)
ns3.dreamhost.com
ns1.dreamhost.com
ns2.dreamhost.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
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:spf.protection.outlook.com -all
Full email verification for threehammer.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits