extu.com

Valid Email Server
Domain Lookup › extu.com

Domain Overview

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

Checked via [email protected] · 2026-03-20 19:12:07 UTC · ↺ Refresh

MX Hostnames

  • extu-com.mail.protection.outlook.com

MX Priorities

  • extu-com.mail.protection.outlook.com: 1

A / AAAA Records

  • 104.26.11.36 (no PTR)
  • 104.26.10.36 (no PTR)
  • 172.67.72.245
  • 2606:4700:20::ac43:48f5
  • 2606:4700:20::681a:b24
  • 2606:4700:20::681a:a24

Mail Server IPs

  • 52.101.9.20 ↩ mail-bl0pr02cu00604.inbound.protection.outlook.com
  • 52.101.194.19 ↩ mail-ch5pr02cu00303.inbound.protection.outlook.com
  • 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
  • 52.101.41.56 ↩ mail-sj0pr21cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:f90b:: ↩ mail-bn6pr04cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:f805::1 ↩ mail-co1pr03cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:f901::2 ↩ mail-bl2pr02cu00402.inbound.protection.outlook.com

SOA Record

Raw SOA graham.ns.cloudflare.com dns.cloudflare.com 2399349777 10000 2400 604800 1800
Primary NS (mname)
graham.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399349777
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

graham.ns.cloudflare.com
perla.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:52.101.9.11 ip4:52.101.42.9 ip4:52.101.41.4 ip4:52.101.10.10 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip4:167.89.0.0/17 ip4:50.31.32.0/19 ip4:198.21.0.0/21 ip4:149.72.0.0/16 ip4:13.111.0.0/16 ip4:198.2.128.0/24 ip4:198.2.132.0/22 ip4:198.2.136.0/23 ip4:198.2.145.0/24 ip4:198.2.186.0/23 ip4:198.2.177.0/24 ip4:198.2.178.0/23 ip4:198.2.180.0/24 ip4:204.239.0.0/24 ip4:43.228.186.98 include:_spf0000000.extu.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected],mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected],mailto:[email protected]

DKIM Selectors

✓ 5 found
google._domainkey
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

20 records
  • ZOOM_verify_7kCjMpfQUv9gbJ0tVU5hfd
  • atlassian-domain-verification=ie9y1NrT5Js0JJyQ8k8H7b13FW3B7WgG24a/CCf7/Dt7nij0Z5QWtV6ZYIEPHAUy
  • mandrill_verify.OCiGZxRBxOD6PyOp6re9uA
  • SPFv=spf1 ip4:52.101.9.11 ip4:52.101.42.9 ip4:52.101.41.4 ip4:52.101.10.10 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip4:167.89.0.0/17 ip4:50.31.32.0/19 ip4:198.21.0.0/21 ip4:149.72.0.0/16 ip4:13.111.0.0/16 ip4:198.2.128.0/24 ip4:198.2.132.0/22 ip4:198.2.136.0/23 ip4:198.2.145.0/24 ip4:198.2.186.0/23 ip4:198.2.177.0/24 ip4:198.2.178.0/23 ip4:198.2.180.0/24 ip4:204.239.0.0/24 ip4:43.228.186.98 include:_spf0000000.extu.com ~all
  • sending_domain511731=abdba647daa0f39b9ae4eac1f24545052670f83f79bd326f1d0f593499189cf7
  • knowbe4-site-verification=1a09b7b6c66271de7746bc3bfecdca62
  • sending_domain511731=a5c7e1e76389fa2f060366b5d836f199621014341015b21737dc472066bd6f7c
  • pardot955103=4d5c0001cc70589b41f67b7bea268d7e1472ecdd17753933ed3b70177c8ef85e
  • have-i-been-pwned-verification=dweb_3k2pkjc62hmvcpfgiapn6fs5
  • sending_domain955103=43d6ca3c5d57d0970d50b50eb74a63b9cba6260d1eaf074fb3a1d41e1542286b
  • sending_domain511731=c4eb637da4f52e2b3700bc8fe0adc48b8e3ac9e83a4acb25e39671c2d3dc2112
  • MS=ms60934047
  • sending_domain511731=d0a2bed0624c591c8d7373bc8d06466ce6e2b47d8b0faa1f2fa65b23c68bd400
  • sending_domain511731=63c65968a9bf03343aebba86e116692e3c955646d48f33451d171756fcee3858
  • google-site-verification=PpuCcf6fgKFEl7X36GDrR0_wMs3r2SMuA0aY0pSTKvg
  • sending_domain511731=bfb0307d974b9f72e2d3a02cf8af61335c3314067c17bc18b4f73439e92f0a4f
  • pardot511731=e07851816c4e2b0c716af0f708b7bbfcf36eb4138d1fc8aea4c86e5080a61bb7
  • ZOOM_verify_6Ntu1YGiMX63OLtTMzFnVs
  • openai-domain-verification=dv-KQBzNdFSUdCMCefZrpMRf7Xw
  • google-site-verification=Ex695SsuPwc49PUvNJ3qwA9cL15JN38oTLKuJY55coI
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