Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
csdnb.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 19:55:12 UTC · ↺ Refresh
MX Hostnames
- csdnb-org.mail.eo.outlook.com
MX Priorities
- csdnb-org.mail.eo.outlook.com: 10
A / AAAA Records
- 104.17.71.73 (no PTR)
Mail Server IPs
- 52.101.11.17 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 2a01:111:f403:f802::2 ↩ mail-sj2pr05cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f907::1 ↩ mail-dm1pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.cen.ct.gov cen.po.state.ct.us 2010062314 3600 1800 2592000 300
Primary NS (mname)
ns1.cen.ct.gov
Admin Email (rname)
cen@po.state.ct.us
Serial
2010062314
Refresh
3600s
Retry
1800s
Expire
2592000s
Minimum TTL
300s
Nameservers (NS)
ns2.cen.ct.gov
ns1.cen.ct.gov
SPF Record
✓ Strict (-all)
v=spf1 ip4:72.10.98.3 include:spf.protection.outlook.com include:_spf.bbnotify.net include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;rua=mailto:[email protected];ruf=mailto:[email protected];sp=none;fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
7 records- duo_sso_verification=mY0kw8jhkAUMBp7K13jAcZENe4Z8vCDLUL1yLDvt7aEXLxZEHNTTvd6R1a6oJAXD
- SPFv=spf1 ip4:72.10.98.3 include:spf.protection.outlook.com include:_spf.bbnotify.net include:_spf.psm.knowbe4.com -all
- apple-domain-verification=sUeZvqUruAs6C16W
- /iGjWo1jc2YTwc1HPuNkLp/RVaBAKYYT9zKe4avOiMmCP8o3ukCpPxW9LjpO8DMleLENp/uoQYx6hROlhAOvQw==
- MS=ms26249616
- MS=52FBA7C87D68D0D478BF330995AA07E9D4D0289E
- google-site-verification=bhdJRFoMxmGlDQZqNn9Xj8hMvwjqgYhBBkJFHEh1iiA
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