Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ndu.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 01:49:55 UTC · ↺ Refresh
MX Hostnames
- ndu-edu.mail.eo.outlook.com
MX Priorities
- ndu-edu.mail.eo.outlook.com: 0
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.42.18 ↩ mail-co1pr03cu00302.inbound.protection.outlook.com
- 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
- 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
- 52.101.40.24 ↩ mail-cy5pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com
- 2a01:111:f403:f905::4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 2a01:111:f403:c92c::2 ↩ mail-dm2pr04cu00102.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.bdm.microsoftonline.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1.bdm.microsoftonline.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns1.bdm.microsoftonline.com
ns2.bdm.microsoftonline.com
ns3.bdm.microsoftonline.com
ns4.bdm.microsoftonline.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:216.21.18.221 ip4:216.21.18.40 ip4:216.21.18.208 include:spf.protection.outlook.com include:_spf.salesforce.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:[email protected],mailto:[email protected];ri=86400;aspf=r;adkim=r;fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
14 records- smartsheet-gov-site-validation=29W2iXvHo_Vs2NHZeR9WYA3nCbubCgjG
- _4kn4sxk2zvzwf6ncdmg1cd4jlh05flp
- openai-domain-verification=dv-cVPdoMLw28SveJ7inRZyI7Ca
- adobe-idp-site-verification=e5f07cb01684e12a5352726826ecaed23c55c24dfad0588291f02b227906fa8d
- SPFv=spf1 ip4:216.21.18.221 ip4:216.21.18.40 ip4:216.21.18.208 include:spf.protection.outlook.com include:_spf.salesforce.com ~all
- mscid=W8Dk8FDsHshoaBiiAAsu5+3slIYBS8Gjo9K1iOo/fwnUNo6KJ2641POuUKWq0PZAScwYVfJl1DExawWwObP8zg==
- MS=ms66756854
- MS=F9323FDAD99CED8F9ABC0DA3B6D29A06670AE9DC
- CsIanUJZllMB5foymvEaVZzkJMK9b/BPbQBwrLpdPpvdLOUesVjOgsH3rgdsXTpN1axd0SfdDkh+lgG609qW1Q==
- 2cb34vlwksgz2bg3cddz18ngxqy3r013
- apple-domain-verification=GPVAHhpw7dEdHopB
- yKQYmsXM9XomfmLwG1H7U9fFbl7o0l6hiZfnH+n29urmBkG7qTGtlkq+XHA7Vfn28qKPZqVCwZc0ucfgS9z1DQ==
- j0fz981wz0kk4pp3ddvlpn15mh3m2wbs
- docusign=d50b487c-8c2a-4f96-9807-2a582b98734c
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