signature901.com

Valid Email Server
Domain Lookup › signature901.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
signature901.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 05:33:53 UTC · ↺ Refresh

MX Hostnames

  • signature901-com.mail.protection.outlook.com

MX Priorities

  • signature901-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 104.196.234.53 ↩ 53.234.196.104.bc.googleusercontent.com

Mail Server IPs

  • 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
  • 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
  • 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
  • 52.101.8.42 ↩ mail-dm6pr03cu00402.inbound.protection.outlook.com
  • 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:c902:: ↩ mail-sj2pr05cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f903:: (no PTR)
  • 2a01:111:f403:f909:: ↩ mail-bn6pr04cu00200.inbound.protection.outlook.com

SOA Record

Raw SOA ns0.directnic.com hostmaster.ns0.directnic.com 2018031515 28800 14400 604800 86400
Primary NS (mname)
ns0.directnic.com
Admin Email (rname)
hostmaster@ns0.directnic.com
Serial
2018031515
Refresh
28800s
Retry
14400s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

ns2.directnic.com
ns1.directnic.com
ns0.directnic.com
ns3.directnic.com

SPF Record

✓ Strict (-all)
v=spf1 include:authmailers.signature901.com include:spf.protection.outlook.com include:icpbounce.com include:functionfox.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No 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:authmailers.signature901.com include:spf.protection.outlook.com include:icpbounce.com include:functionfox.com -all
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