Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
defenders.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 04:39:58 UTC · ↺ Refresh
MX Hostnames
- defenders-org.mail.protection.outlook.com
MX Priorities
- defenders-org.mail.protection.outlook.com: 10
A / AAAA Records
- 23.185.0.2 (no PTR)
- 2620:12a:8000::2 (no PTR)
- 2620:12a:8001::2
Mail Server IPs
- 52.101.41.24 ↩ mail-sj0pr03cu01600.inbound.protection.outlook.com
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
- 52.101.9.21 ↩ mail-bl2pr04cu00205.inbound.protection.outlook.com
- 52.101.9.5 ↩ mail-mn2pr04cu00205.inbound.protection.outlook.com
- 2a01:111:f403:f903:: (no PTR)
- 2a01:111:f403:f908::1 ↩ mail-bn1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns10.digicertdns.com dns.digicertdns.com 2009010117 43200 3600 1209600 180
Primary NS (mname)
ns10.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009010117
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns0.dnsmadeeasy.com
ns1.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns3.dnsmadeeasy.com
ns4.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.topdesk.net include:spf.netsuitesuiteprojectspro.com include:spf.openair.com include:spf.openair1.com include:_spf.psm.knowbe4.com include:_spf.e-activist.com ip4:199.119.114.5 ip4:173.240.75.126 ip4:23.21.109.212 ip4:172.172.139.18 ip4:63.143.55.162 ip4:64.31.50.152 -all
📊 DNS lookups: 7/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=quarantine; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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
11 records- google-site-verification=_ygo7uU5uh0AEhhd4T4FiTGHJg7G3kuv_3etm_iUPVI
- google-site-verification=0WfLKeVx0kVcZKqUXGsYpG1XfSf0FbEXwHa4Q4CYSXI
- apple-domain-verification=_Xg921nhUYbsqjetkAJgHzeTE_u1KEwH3HkSVrnpUbY
- _globalsign-domain-verification=oSunbAON9BBXJfUjTsxxPpm-c1c3RtFUe1MeJ_gUMS
- MS=ms26792025
- facebook-domain-verification=9qmhq4fjf6wgsvdhha360xa0i8ii43
- apple-domain-verification=TlZE9lqHQpg4vWqQ
- defenders.org. 18000 IN TXT v=spf1 include:autotask.net ~all
- SPFv=spf1 include:spf.protection.outlook.com include:spf.topdesk.net include:spf.netsuitesuiteprojectspro.com include:spf.openair.com include:spf.openair1.com include:_spf.psm.knowbe4.com include:_spf.e-activist.com ip4:199.119.114.5 ip4:173.240.75.126 ip4:23.21.109.212 ip4:172.172.139.18 ip4:63.143.55.162 ip4:64.31.50.152 -all
- F2KD2TUX3J._autotask.defenders.org
- google-site-verification=a5fUPLDY4gQds9kT3DUKnorisjwtM15tm75kdhDc3Zc
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for defenders.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits