nbc.edu

Valid Email Server
Domain Lookup › nbc.edu
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
nbc.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-21 05:05:49 UTC · ↺ Refresh

MX Hostnames

  • nbc-edu.mail.protection.outlook.com

MX Priorities

No priority data.

A / AAAA Records

  • 135.84.43.22
  • 135.84.43.23

Mail Server IPs

No IPs resolved.

SOA Record

No SOA record found.

Nameservers (NS)

ns-1637.awsdns-12.co.uk
ns-305.awsdns-38.com
ns-990.awsdns-59.net
ns-1405.awsdns-47.org

SPF Record

✓ Strict (-all)
v=spf1 mx ip4:107.132.178.249 include:spf.protection.outlook.com include:amazonses.com include:relay.mailchannels.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1:d:s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]

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

3 records
  • SPFv=spf1 mx ip4:107.132.178.249 include:spf.protection.outlook.com include:amazonses.com include:relay.mailchannels.net -all
  • MS=36F71B5CF8211C1B316102DBFF86AECE6BC7F997
  • duo_sso_verification=3sBVjvporAA9yf5hdv8ZGc9Wk7boYtCcHjK0ISRSlbcW5x4mFA7lHyAbrV5GslcZ
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