tekmasters.com

Valid Email Server
Domain Lookup › tekmasters.com

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
tekmasters.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-19 09:00:18 UTC · ↺ Refresh

MX Hostnames

  • crimsonphoenix.mail.protection.office365.us

MX Priorities

  • crimsonphoenix.mail.protection.office365.us: 0

A / AAAA Records

  • 172.67.166.165 (no PTR)
  • 104.21.34.249 (no PTR)
  • 2606:4700:3033::6815:22f9 (no PTR)
  • 2606:4700:3035::ac43:a6a5 (no PTR)

Mail Server IPs

  • 23.103.199.138 ↩ mail-bn3usg020138.inbound.protection.outlook.com
  • 23.103.199.170 ↩ mail-cy1usg020170.inbound.protection.outlook.com
  • 2001:489a:2202:5::10 ↩ mail-cy1usg020010.inbound.protection.outlook.com
  • 2001:489a:2202:4::10 ↩ mail-bn3usg020010.inbound.protection.outlook.com

SOA Record

Raw SOA elliott.ns.cloudflare.com dns.cloudflare.com 2399588460 10000 2400 604800 1800
Primary NS (mname)
elliott.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399588460
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

paityn.ns.cloudflare.com
elliott.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.office365.us -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._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

4 records
  • MS=ms27095944
  • MS=ms65038423
  • MS=ms84429448
  • SPFv=spf1 include:spf.protection.office365.us -all
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