naperville.il.us

Valid Email Server
Domain Lookup › naperville.il.us

Domain Overview

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

Checked via [email protected] · 2026-03-21 02:16:56 UTC · ↺ Refresh

MX Hostnames

  • naperville-il-us.mail.protection.outlook.com

MX Priorities

  • naperville-il-us.mail.protection.outlook.com: 0

A / AAAA Records

  • 45.60.62.206 (no PTR)
  • 45.60.107.206 (no PTR)

Mail Server IPs

  • 52.101.9.19 ↩ mail-blapr09cu00103.inbound.protection.outlook.com
  • 52.101.8.50 ↩ mail-dm6pr09cu00202.inbound.protection.outlook.com
  • 52.101.11.12 ↩ mail-sa9pr09cu00104.inbound.protection.outlook.com
  • 52.101.8.52 ↩ mail-ds0pr09cu00104.inbound.protection.outlook.com
  • 2a01:111:f403:f900::1 ↩ mail-blapr09cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f904::1 ↩ mail-ds0pr09cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:f904:: ↩ mail-dm6pr09cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:f90e::1 ↩ mail-sa9pr09cu00101.inbound.protection.outlook.com

SOA Record

Raw SOA ns3.naperville.il.us admin.naperville.il.us 2026031901 28800 7200 604800 10
Primary NS (mname)
ns3.naperville.il.us
Admin Email (rname)
admin@naperville.il.us
Serial
2026031901
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
10s

Nameservers (NS)

ns4.naperville.il.us
ns3.naperville.il.us
ns1.naperville.il.us
ns2.naperville.il.us

SPF Record

✓ Strict (-all)
v=spf1 ip4:131.156.181.253 ip4:12.23.123.61 ip4:208.64.237.225 ip4:52.202.244.35 ip4:207.245.140.195 ip4:207.245.141.20 include:spf.protection.outlook.com include:spfhost.messageprovider.com include:amazonses.com include:_spf01.mykronos.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 3 found
dkim._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 64 chars (valid)
✓ DKIM properly configured for selector: dkim

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

All TXT Records

4 records
  • SPFv=spf1 ip4:131.156.181.253 ip4:12.23.123.61 ip4:208.64.237.225 ip4:52.202.244.35 ip4:207.245.140.195 ip4:207.245.141.20 include:spf.protection.outlook.com include:spfhost.messageprovider.com include:amazonses.com include:_spf01.mykronos.com -all
  • MS=MS84014629
  • apple-domain-verification=O4GCZmNm81qFKEMx
  • P/3huyOTb395viLngzzlT1lMkeDo3LbGdRM6z1KNym32KpfexwpK1ZK5Uh4rmaSQaUD197amn3ZqXZOtogtauw==
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