shell.us

Valid Email Server
Domain Lookup › shell.us

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
shell.us
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-26 04:29:08 UTC · ↺ Refresh

MX Hostnames

  • shell-us.mail.protection.outlook.com

MX Priorities

  • shell-us.mail.protection.outlook.com: 10

A / AAAA Records

  • 4.210.156.184 (no PTR)

Mail Server IPs

  • 52.101.73.12 ↩ mail-am4pr0401cu00104.inbound.protection.outlook.com
  • 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::7 ↩ mail-db4pr02cu00307.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::10 ↩ mail-dbapr03cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::2 ↩ mail-am0pr83cu00402.inbound.protection.outlook.com

SOA Record

Raw SOA dns1.shell.com dns.shell.com 18790 10800 1080 2419200 600
Primary NS (mname)
dns1.shell.com
Admin Email (rname)
dns@shell.com
Serial
18790
Refresh
10800s
Retry
1080s
Expire
2419200s
Minimum TTL
600s

Nameservers (NS)

dns3.shell.com
dns2.shell.com
dns1.shell.com

SPF Record

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

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=reject; fo=1; pct=100; ruf=mailto:[email protected]; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject

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

7 records
  • _5wtvr6abpj9l6dz0y4zxf6t8lw6l9em
  • MS=ms15458692
  • facebook-domain-verification=6d0i6m6zursxdh7bs7wrhhaeus0fl1
  • google-site-verification=d7uVJU7PltHMpzMtfDHIMJbhgtgFTOtx2e_ZqcD5oeA
  • hjjm6s123j9zmq85g2wzbm5wzny7rp4v
  • SPFv=spf1 include:spf.protection.outlook.com -all
  • google-site-verification=40-T0hkZqqAOCq3dV8F6aXbm06k5i3o0jYH0evDshBw
Full email verification for shell.us

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits