npenn.org

Valid Email Server
Domain Lookup › npenn.org

Domain Overview

DNS: ✓ 2d ago Checker: ✓ 2d ago
npenn.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-05-19 10:12:16 UTC · ↺ Refresh

MX Hostnames

  • ALT1.ASPMX.L.GOOGLE.COM
  • ALT4.ASPMX.L.GOOGLE.COM
  • ASPMX.L.GOOGLE.COM
  • ALT2.ASPMX.L.GOOGLE.COM
  • ALT3.ASPMX.L.GOOGLE.COM

MX Priorities

  • alt3.aspmx.l.google.com: 10
  • alt4.aspmx.l.google.com: 10
  • aspmx.l.google.com: 1
  • alt1.aspmx.l.google.com: 5
  • alt2.aspmx.l.google.com: 5

A / AAAA Records

  • 162.159.136.49
  • 162.159.135.49

Mail Server IPs

  • 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 173.194.76.26 ↩ ws-in-f26.1e100.net
  • 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
  • 142.251.179.27 ↩ pd-in-f27.1e100.net
  • 2607:f8b0:4004:c17::1b ↩ bl-in-f27.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1a (no PTR)
  • 172.253.116.26 ↩ dj-in-f26.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net

SOA Record

Raw SOA mmhm.comcastbusiness.net hostmaster.npenn.org 2024022819 7200 3600 604800 3600
Primary NS (mname)
mmhm.comcastbusiness.net
Admin Email (rname)
hostmaster@npenn.org
Serial
2024022819
Refresh
7200s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns4.comcastbusiness.net
ns5.comcastbusiness.net
ns1.comcastbusiness.net
ns2.comcastbusiness.net
ns3.comcastbusiness.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:_spf.bbnotify.net include:_spf.psm.knowbe4.com include:customerspf.schoolmessenger.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google

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

All TXT Records

6 records
  • adobe-idp-site-verification=5f2c0426b4ea09e303c8d5b08120116880a295231d20d2e200277fe989491e80
  • SPFv=spf1 include:_spf.google.com include:_spf.bbnotify.net include:_spf.psm.knowbe4.com include:customerspf.schoolmessenger.com ~all
  • autodesk-domain-verification=P45Nv04IpHlQjMsDsLLN
  • openai-domain-verification=dv-gOWG3LWuTUOkEPaGt3gyp7V1
  • MS=ms38199996
  • duo_sso_verification=bfhrngIdvRYvQ9lyriD1M1puL6lTcD0iGko7nHjIvAvuHe2Glv7vQqaMVi47VhhA
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